Trimble Surveys Myrddyn Phillips

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2			© 2013 - 2017 Myrddyn Phillips. Non-commercial copying is permitted provided attribution is preserved. Re-use of the data in this or another format requires the permission of the blog author.
3				Contains OS Data © Crown copyright and database rights 2016, licensed under the OGL (see at http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ ).
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5	Number (P14)	Number (P20)	Number (P30)	Date	Time	Satellites	Points	Group	Cardinal Hill	Region	Sub Region	Hill Number	Name	Alternative Ordnance Survey Name	1:50,000 Map	1:25,000 Map	Grid Reference (Map)	Summit / Bwlch	Map Height (m)	Processed Survey Height (m)	Processed Survey Height (m) OSGM15	Grid Reference (Survey)		Drop (m)	Dominance (%)	Status	Measurement Uncertainty (m) (Height)	Standard Deviation (m)	Position of Trimble	Measurement Offset (m)	Estimated Accuracies	Terrain	Base Stations	Further comments
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7	1065	957	774	27/01/2024	1.35pm	14	300 (5 min)	Moel y Gamelin		Nroth Wales A	A2	7523	Caer Drewyn	N/A	125	255, 256	SJ 09128 44418	Summit	314	Trimble converted to OSGM15	313.508 (313.456m Leica GS15 by JB & GJ)	SJ 09127 44416 (SJ 09127 44416 Leica GS15 by JB & GJ)		90.8 (90.8m Lrica GS125 by JB & GJ)	28.97% (28.96% Leica GS15 by JB & GJ)	Subhump, Trichant	0.02	0.033	Trimble on rucksack	0.34	Range 5-15cm: 100.00%	Small mound	Processed from nearest available five base stations - St Asaph, Shrewsbury, Machynlleth, Daresbury and Crewe
8	1064	956		25/11/2023	10.27am	20	840 (14 min)	Drygarn Fawr		South Wales B	B1	7631	Esgair Garthen	N/A	147	187, 200	SN 82516 64279	Summit	507	Trimble converted to OSGM15	508.073	SN 82531 64276		22.7	4.47%	Pellennig, Welsh Highland P15, Subdodd	0.1	0.055	Trimble on rucksack	0.38	Range 5-15cm: 82.56%	Moor grass 2 metres from quad bike track	Processed from nearest available five base stations - Machynlleth, Brecon, Shobdon, Aberporth and Swansea
9	1063	955		11/11/2023	11.09am	18	360 (6 min)	Carn yr Hyrddod		South Wales B	B1	7630	Esgair Hengae	N/A	135, 136, 147	200	SN 81524 68628	Summit	510	Trimble converted to OSGM15	509.752	SN 81511 68622		21.5	4.22%	Welsh Highland P15, Subdodd	0.1	0.035	Trimble on rucksack	0.4	Range 5-15cm: 100.00%	Grass	Processed from nearest available five base stations - Machynlleth, Brecon, Shobdon, Aberporth and Swansea
10	1062	954	773	16/09/2023	9.29am	19	360 (6 min)	Drygarn Fawr		South Wales B	B1	3507	Mynydd Trawsnant	N/A	147	187	SN 82136 48415	Summit	517	Trimble converted to OSGM15	516.256m (516.559m LIDAR height prioritised)	SN 82452 48559 (SN 82452 48564 LIDAR position prioritised)		138.3	26.77%	Hump,Welsh Highland P15,500m Twmpau,Dewey,Dodd	0.2	0.026	Trimble on rucksack	0.43	Range 5-15cm: 100.00%	Felled forestry	Processed from nearest available five base stations - Brecon, Machynlleth, Aberporth, Shobdon and Swansea
11				06/09/2023	10.48am	20	300 (5 min)	Carnedd Wen		Nroth Wales A	A3	15430	Castell Dolforwyn	Dolforwyn Castle	136	215	SO 15182 95018	Summit 2	231 (Geo)	Trimble converted to OSGM15	228.475	SO 15205 95033					0.02	0.028	Trimble on rucksack	0.38	Range 5-15cm: 100.00%	Grass	Processed from nearest available five base stations - Machynlleth, Shrewsbury, Shobdon, Brecon and Droitwich
12	1061	953	772	06/09/2023	10.37am	16	180 (3 min)	Carnedd Wen		Nroth Wales A	A3	15430	Castell Dolforwyn	Dolforwyn Castle	136	215	SO 15182 95018	Summit 1	231 (Geo)	Trimble converted to OSGM15	228.523	SO 15189 95016		40.4	17.68%	200m Twmpau	0.01	0.069	Trimble on rucksack	0.37	Range 5-15cm: 99.34%	Grass 1metre from stone wall	Processed from nearest available five base stations - Machynlleth, Shrewsbury, Shobdon, Brecon and Droitwich
13	1060	952		02/09/2023	10.54am	16	300 (5 min)	Cefn yr Ystrad		South Wales B	B5		Clo Cadno	N/A	161	13	SO 11849 16241	Summit	c 520m (c 530m OS Maps)	Trimble converted to OSGM15	529.590 (530.289m LIDAR height prioritised)	SO 11851 16246 (SO 11849 16247 LIDAR position prioritised)		16.7	3.15%	Welsh Highland P15	0.075	0.044	Trimble on rucksack	0.42	Range 30-50cm: 99.02%	Heather	Processed from nearest available five base stations - Brecon, Cardiff, Shobdon, Swansea and Stroud
14				10/08/2023	12.11pm	10	300 (5 min)	Gwaun Ceste		South Wales B	B3	2184	Gwaun Ceste		148	200	SO 15819 55547	Summit 1C	542	Trimble converted to OSGM15	542.034	SO 15820 55548					0.05	0.023	Trimble on rucksack	0.36	Range 5-15cm: 100.00%	Grass 1 metre from trig	Processed from nearest available five base stations - Shobdon, Brecon, Machynlleth, Shrewsbury and Droitwich
15				10/08/2023	12.01pm	10	300 (5 min)	Gwaun Ceste		South Wales B	B3	2184	Gwaun Ceste	Gwaunceste Hill	148	200	SO 15819 55547	Summit 1B	542	Trimble converted to OSGM15	542.109	SO 15821 55547		165.2	30.47%	Marilyn, Hump, Dodd, Welsh Highland P15, Dewey	0.05	0.075	Trimble on rucksack	0.40	Range 30-50cm: 92.35%	Grass 1 metre from trig	Processed from nearest available five base stations - Shobdon, Brecon, Machynlleth, Shrewsbury and Droitwich
16				10/08/2023	11.42am	8	300 (5 min)	Gwaun Ceste		South Wales B	B3	2184	Gwaun Ceste		148	200	SO 15819 55547	Summit 2B	542	Trimble converted to OSGM15	541.882	SO 15876 55374					0.20	0.048	Trimble on rucksack	0.45	Range 5-15cm: 100.00%	Heather	Processed from nearest available five base stations - Shobdon, Brecon, Machynlleth, Shrewsbury and Droitwich
17				10/08/2023	11.21am	7	300 (5 min)	Gwaun Ceste		South Wales B	B3	2184	Gwaun Ceste		148	200	SO 15819 55547	Summit 2A	542	Trimble converted to OSGM15	541.817	SO 15877 55374					0.20	0.045	Trimble on rucksack	0.47	Range 5-15cm: 100.00%	Heather	Processed from nearest available five base stations - Shobdon, Brecon, Machynlleth, Shrewsbury and Droitwich
18	305	277	219	09/07/2015	3.36pm	10	540 (9 min)	Fforest Glud	Gwaun Ceste	31B		2184	Gwaun Ceste		148	200	SO 15819 55547	Summit 1A	542	541.974	542.002	SO 15821 55547					0.08	0	Trimble on ground	0	Range 5-15cm: 100.00%	Grass 1 metre from trig	Processed from nearest available five base stations - Brecon, Machynlleth, Shrewsbury, Droitwich and Cardiff
19	304	276	218	09/07/2015	1.49pm	8	300 (5 min)	Fforest Glud	Gwaun Ceste	31B		14893	Little Hill	N/A	148	200	SO 17269 53775	Summit 2	469	469.16	469.188	SO 17175 53749		46.5	9.91%	Pedwar	0.2	0	Trimble on ground	0	Range 5-15cm: 100.00%	Bilberry	Processed from nearest available five base stations - Brecon, Machynlleth, Shrewsbury, Droitwich and Cardiff
20				09/07/2015	1.30pm	9	300 (5 min)	Fforest Glud	Gwaun Ceste	31B		14893	Little Hill		148	200	SO 17269 53775	Summit 1	469	468.928	468.956	SO 17268 53774					0.15	0	Trimble on ground	0	Range 5-15cm: 100.00%	Grass and bilberry	Processed from nearest available five base stations - Brecon, Machynlleth, Shrewsbury, Droitwich and Cardiff
21				10/08/2023	10.22am	15	300 (5 min)	Gwaun Ceste		South Wales B	B3	14893	Little Hill		148	200	SO 16395 54416	Bwlch 2	423 (Geo)	Trimble converted to OSGM15	422.675	SO 16357 54404					0.15	0.039	Trimble on rucksack	0.44	Range 5-15cm: 99.78%	Heather	Processed from nearest available five base stations - Shobdon, Brecon, Machynlleth, Shrewsbury and Droitwich
22				09/07/2015	2.22pm	9	420 (7 min)	Fforest Glud	Gwaun Ceste	31B		14893	Little Hill		148	200	SO 16395 54416	Bwlch 1	423 (Geo)	422.725	422.753	SO 16388 54416					0.5	0	Trimble on ground	0	Range 5-15cm: 100.00%	Grass beside reeds	Processed from nearest available five base stations - Brecon, Machynlleth, Shrewsbury, Droitwich and Cardiff
23	1059	951	771	01/07/2023	9.33am	9	300 (5 min)	Drygarn Fawr		South Wales B	B1	3513	Pt. 506.0m	N/A	147	187, 200	SN 81758 55418	Summit	505	Trimble converted to OSGM15	506.010	SN 81733 55429		43.3	8.56%	Welsh Highland P15, 500m Twmpau, Dewey, Dodd	0.15	0.029	Trimble on rucksack	0.65	Range 5-15cm: 99.42%	Felled forestry	Processed from nearest available five base stations - Brecon, Machynlleth, Aberporth, Shobdon and Swansea
24	593	539	438	06/06/2023	6.37pm	18	120 (2 min)	Cefn yr Ystrad		South Wales B	B5		Twyn y Waun	Twn y Waun	160	12, 166	SO 08440 07352	Summit (natural)	c 450 (Geo)	Trimble converted to OSGM15	450.644	SO 08442 07378		70.7 (Trimble summit and LIDAR bwlch)	15.68% (Trimble summit and LIDAR bwlch)	Dual Summit Pedwar	0.15	0.019	Trimble on rucksack	0.43	Range 5-15cm: 100.00%	Grass	Processed from nearest available five base stations - Brecon, Cardiff, Swansea, Shobdon and Stroud
25	593	539	438	01/12/2017	11.37am	9	300 (5 min)	Y Cymoedd - dwyreiniol	Twyn y Waun	South Wales C	C2	15615	Twyn y Waun	Twn y Waun	160	12, 166	SO 08436 07351	Summit 3	c 450 (Geo)	Trimble converted to OSGM15	475.958	SO 08209 07041		96.0 (Trimble summit and LIDAR bwlch)	20.16% (Trimble summit and LIDAR bwlch)	Dual Summit Pedwar	0.6	0	Trimble on small rock	0.02	Range 5-15cm: 100.00%	Solid waste spoil	Processed from nearest available five base stations - Brecon, Cardiff, Swansea, Shobdon and Stroud
26				01/12/2017	9.37am	11	300 (5 min)	Y Cymoedd - dwyreiniol	Twyn y Waun	South Wales C	C2	15615	Twyn y Waun		160	12, 166	SO 08436 07351	Summit 2	c 450 (Geo)	Trimble converted to OSGM15	475.817	SO 08213 07016					0.6	0	Trimble on ground	0	Range 5-15cm: 100.00%	Small embedded rock amongst solid waste spoil	Processed from nearest available five base stations - Brecon, Cardiff, Swansea, Shobdon and Stroud
27				01/12/2017	9.10am	11	360 (6 min)	Y Cymoedd - dwyreiniol	Twyn y Waun	South Wales C	C2	15615	Twyn y Waun		160	12, 166	SO 08436 07351	Summit 1	c 450 (Geo)	Trimble converted to OSGM15	475.714	SO 08357 07132					0.6	0	Trimble on ground	0	Range 5-15cm: 100.00%	Small embedded rock amongst solid waste spoil	Processed from nearest available five base stations - Brecon, Cardiff, Swansea, Shobdon and Stroud
28	1058	950	770	06/06/23	5.07pm	20	180 (3 min)	Cefn yr Ystrad		South Wales B	B5	7662	Cefn y Brithdir	N/A	171	166	SO 12062 04330	Summit 3	446	Trimble converted to OSGM15	444.774	SO 12037 04322		86.5	19.46%	Pedwar	0.08	0.018	Trimble on rucksack	0.42	Range 5-15cm: 100.00%	Grass	Processed from nearest available five base stations - Cardiff, Brecon, Swansea, Shobdon and Stroud
29				06/06/23	4.57pm	18	180 (3 min)	Cefn yr Ystrad		South Wales B	B5	7662	Cefn y Brithdir	N/A	171	166	SO 12062 04330	Summit 2	446	Trimble converted to OSGM15	444.691	SO 11974 04410					0.1	0.018	Trimble on rucksack	0.41	Range 5-15cm: 100.00%	Grass	Processed from nearest available five base stations - Cardiff, Brecon, Swansea, Shobdon and Stroud
30				06/06/23	4.49pm	17	180 (3 min)	Cefn yr Ystrad		South Wales B	B5	7662	Cefn y Brithdir	N/A	171	166	SO 12062 04330	Summit 1	446	Trimble converted to OSGM15	444.673	SO 11979 04396					0.02	0.053	Trimble on rucksack	0.41	Range 5-15cm: 100.00%	Grass under telegraph poles	Processed from nearest available five base stations - Cardiff, Brecon, Swansea, Shobdon and Stroud
31	1057	949	769	06/06/23	3.39pm	15	300 (5 min)	Cefn yr Ystrad		South Wales B	B5	15610	Mynydd Rhymni	Rhymney Hill/Rhymni Hill	161	13, 166	SO 12572 08955	Summit	457	Trimble converted to OSGM15	457.4	SO 12593 08981		78.1	17.08%	Pedwar	0.01	0.019	Trimble on rucksack	0.33	Range 5-15cm: 100.00%	Grass 1 metre from base of cairn	Processed from nearest available five base stations - Brecon, Cardiff, Swansea, Shobdon and Stroud
32	1056	948	768	06/06/23	2.06pm	17	300 (5 min)	Cefn yr Ystrad		South Wales B	B5	5271	Twyn yr Hyddod	Mynydd Bedwellte	161	13, 166	SO 14514 06011	Summit	486	Trimble converted to OSGM15	485.6	SO 14515 06012		116.2	23.93%	Hump, Pedwar	0.02	0.052	Trimble on rucksack	0.25	Range 5-15cm: 100.00%	Grass 1 metre from base of trig pillar	Processed from nearest available five base stations - Brecon, Cardiff, Swansea, Shobdon and Stroud
33	1055	947		27/05/23	9.59am	20	300 (5 min)	Carn yr Hyrddod		South Wales B	B1	7624	Clawdd Du Mawr	N/A	135, 136, 147	200	SN 85177 69037	Summit	535	Trimble converted to OSGM15	532.873 (533.270m LIDAR height prioritised)	SN 85178 69029 (SN 85179 69030 LIDAR position prioritised)		25.8	4.84%	Pellennig, Welsh Highland P15, 500m Twmpau, Subdodd	0.2	0.028	Trimble on rucksack	0.43	Range 30-50cm: 100.00%	Moor grass	Processed from nearest available five base stations - Machynlleth, Brecon, Shobdon, Aberporth and Shrewsbury
34	1054	946	767	25/05/23	4.50pm	17	300 (5 min)	Y Garn		South Wales B	B1	14959	Esgair Llwyn Gwyn	Esgair Llwyn-gwyn	135, 136, 147	214	SN 88587 79068	Summit	438	Trimble converted to OSGM15	435.905	SN 88577 79070		33.6	7.71%	Pedwar	0.75	0.029	Trimble on rucksack	0.47	Range 5-15cm: 100.00%	Reed grass	Processed from nearest available five base stations - Machynlleth, Brecon, Shobdon, Aberporth and Shrewsbury
35				25/05/23	5.37pm	19	300 (5 min)	Y Garn		South Wales B	B1	14959	Esgair Llwyn Gwyn	Esgair Llwyn-gwyn	135, 136, 147	214	SN 88119 78763	Bwlch	405 (Geo)	Trimble converted to OSGM15	402.294	SN 88120 78848					0.6	0.029	Trimble on rucksack	0.52	Range 5-15cm: 100.00%	Tussock grass	Processed from nearest available five base stations - Machynlleth, Brecon, Shobdon, Aberporth and Shrewsbury
36	1053			20/05/23	11.37am	18	840 (14 min)	Carn yr Hyrddod		South Wales B	B1		Esgair y Llyn	N/A	135, 136, 147	200	SN 84095 70165	Summit	c 520	Trimble converted to OSGM15	528.604	SN 84116 70174		15.6	2.96%	Welsh Highland P15, Pellennig	0.14	0.037	Trimble on rucksack	0.44	Range 5-15cm: 100.00%	Moor grass	Processed from nearest available five base stations - Machynlleth, Brecon, Shobdon, Aberporth and Shrewsbury
37				20/05/23	12.12pm	20	300 (5 min)	Carn yr Hyrddod		South Wales B	B1		Esgair y Llyn	N/A	135, 136, 147	200	SN 83818 70095	Bwlch	510m - 520m	Trimble converted to OSGM15	512.966	SN 83810 70088					0.16	0.042	Trimble on rucksack	0.49	Range 5-15cm: 100.00%	Tussocks and bog	Processed from nearest available five base stations - Machynlleth, Brecon, Shobdon, Aberporth and Shrewsbury
38				20/05/23	10.45am	19	420 (7 min)	Carn yr Hyrddod		South Wales B	B1		Esgair Pentanau	N/A	135, 136, 147	200	SN 84690 70333	Summit	503	Trimble converted to OSGM15	504.247	SN 84648 70308		11.0	2.18%	Welsh Highland Sub	0	0.036	Trimble on ground	0	Range 5-15cm: 100.00%	Large boulder	Processed from nearest available five base stations - Machynlleth, Brecon, Shobdon, Aberporth and Shrewsbury
39				20/05/23	10.16am	19	360 (6 min)	Carn yr Hyrddod		South Wales B	B1		Esgair Pentanau	N/A	135, 136, 147	200	SN 84476 69972	Bwlch	490m - 500m	Trimble converted to OSGM15	493.231	SN 84472 69977					0.1	0.038	Trimble on rucksack	0.45	Range 5-15cm: 100.00%	Tussocks beside dam wall	Processed from nearest available five base stations - Machynlleth, Brecon, Shobdon, Aberporth and Shrewsbury
40	1052			03/05/23	8.38am	19	300 (5 min)	Pumlumon		South Wales B	B1		Craig Yspio	N/A	135	213	SN 78057 83122	Summit	c 510	Trimble converted to OSGM15	517.651	SN 78042 83130		15.3	2.96%	Welsh Highland P15	0.05	0.043	Trimble on rucksack	0.3	Range 5-15cm: 100.00%	Grass	Processed from nearest available five base stations - Machynlleth, Brecon, Aberporth, Shobdon and Aberdaron
41				03/05/23	8.53am	18	300 (5 min)	Pumlumon		South Wales B	B1		Craig Yspio	N/A	135	213	SN 78103 83188	Bwlch	500m - 510m	Trimble converted to OSGM15	502.351	SN 78099 8316					0.15	0.037	Trimble on rucksack	0.48	Range 5-15cm: 100.00%	Tssock grass and heather	Processed from nearest available five base stations - Machynlleth, Brecon, Aberporth, Shobdon and Aberdaron
42	1051	945	766	29/04/23	10.20am	14	120 (2 min)	Drygarn Fawr		South Wales B	B1	3498	Esgair Cloddiad	N/A	147	187, 200	SN 82466 57367	Summit	532	Trimble converted to OSGM15	532.287	SN 82471 57371		31.5	5.91%	Welsh Highland P15, Dewey, Dodd	0	0.025	Trimble on ground	0	Range 5-15cm: 98.93%	Boulder in conifer plantation	Processed from nearest available five base stations - Brecon, Machynlleth, Shobdon, Aberporth and Swansea
43	1050			22/04/23	12.19pm	20	360 (6 min)	Pumlumon		South Wales B	B1		Foel Wyddon	N/A	135	213	SN 78806 83662	Summit 2	535	Trimble converted to OSGM15	536.195	SN 78813 83668		15.3	2.85%	Welsh Highland P15	0.03	0.054	Trimble on rucksack	0.45	Range 5-15cm: 95.20%	Rough moor grass	Processed from nearest available five base stations - Machynlleth, Brecon, Aberporth, Shobdon and Aberdaron
44				22/04/23	12.10pm	21	180 (3 min)	Pumlumon		South Wales B	B1		Foel Wyddon	N/A	135	213	SN 78806 83662	Summit 1	535	Trimble converted to OSGM15	535.863	SN 78806 83651					0.05	0.024	Trimble on rucksack	0.45	Range 5-15cm: 100.00%	Rough moor grass	Processed from nearest available five base stations - Machynlleth, Brecon, Aberporth, Shobdon and Aberdaron
45				22/04/23	12.36pm	21	300 (5 min)	Pumlumon		South Wales B	B1		Foel Wyddon	N/A	135	213	SN 78782 83869	Bwlch	520m - 530m	Trimble converted to OSGM15	520.929	SN 78783 83858					0.05	0.04	Trimble on rucksack	0.48	Range 5-15cm: 100.00%	Rough moor grass	Processed from nearest available five base stations - Machynlleth, Brecon, Aberporth, Shobdon and Aberdaron
46				22/04/23	11.10am	16	600 (10 min)	Pumlumon		South Wales B	B1		Pt. 564.9m	N/A	135	213	SN 78406 83920	Summit	564	Trimble converted to OSGM15	564.853	SN 78376 83898		13.9	2.47%	Welsh Highland Sub	0.75	0.04	Trimble on rucksack	0.65	Range 5-15cm: 100.00%	Felled forestry	Processed from nearest available five base stations - Machynlleth, Brecon, Aberporth, Shobdon and Aberdaron
47				22/04/23	11.41am	16	300 (5 min)	Pumlumon		South Wales B	B1		Pt. 564.9m	N/A	135	213	SN 78638 84100	Bwlch	550m - 560m	Trimble converted to OSGM15	550.928	SN 78650 84107					0.05	0.04	Trimble on rucksack	0.45	Range 5-15cm: 100.00%	Track	Processed from nearest available five base stations - Machynlleth, Brecon, Aberporth, Shobdon and Aberdaron
48	1049	944		07/04/23	12.27pm	12	2 seconds	Esgair Wen		South Wales B	B1		Esgair Llyn Du	Esgair Llyn-du	146, 147	187	SN 76773 61774	Summit 2	534 (Geo)	Trimble converted to OSGM15	532.552 (532.849m LIDAR height prioritised)	SN 76770 61772 (SN 76930 62044 LIDAR position prioritised)		20 (19.0m LIDAR drop prioritised)	3.75% (3.57% LIDAR dominance prioritised)	Pellennig, Welsh Highland P15	0.25	N/R	Trimble on rucksack	0.5	Range 0.5-1m: 27.97%	Tussock grass	Processed from nearest available five base stations - Machynlleth, Brecon, Aberporth, Shobdon and Swansea
49				07/04/23	12.01pm	16	300 (5 min)	Esgair Wen		South Wales B	B1		Esgair Llyn Du	Esgair Llyn-du	146, 147	187	SN 76692 61637	Summit 1	c 530	Trimble converted to OSGM15	531.914	SN 76691 61642					0.5	0.1	Trimble on rucksack	0.55	Range 30-50cm: 98.68%	Moss and heather	Processed from nearest available five base stations - Machynlleth, Brecon, Aberporth, Shobdon and Swansea
50	1048			07/04/23	11.15am	17	120 (2 min)	Esgair Wen		South Wales B	B1		Pt. 503.9m	N/A	146, 147	187	SN 77596 62582	Summit	504	Trimble converted to OSGM15	503.874	SN 77606 62581	c	17	3.35%	Welsh Highland P15	N/R	0.022	Trimble on ground	0	Range 5-15cm: 96.22%	Moss and rough grass	Processed from nearest available five base stations - Machynlleth, Brecon, Aberporth, Shobdon and Swansea
51	1047			07/04/23	10.53am	17	120 (2 min)	Esgair Wen		South Wales B	B1		Pt. 501.5m	N/A	146, 147	187	SN 77679 62980	Summit	502	Trimble converted to OSGM15	501.532	SN 77686 62986		16	3.10%	Welsh Highland P15	N/R	0.038	Trimble on ground	0	Range 15-30cm: 61.25%	Moss and rough grass	Processed from nearest available five base stations - Machynlleth, Brecon, Aberporth, Shobdon and Swansea
52				11/03/23	10.07am	18	120 (2 min)	Moelwyn Mawr		North Wales A	A2		Cerrig Cochion	N/A	115	17	SH 66127 50889	Summit 2	c 530	Trimble converted to OSGM15	538.53	SH 66139 50880		10.4	1.93%	Welsh Highland Sub	0	0.023	Trimble on ground	0	Range 5-15cm: 100.00%	Rock	Processed from nearest available five base stations - St Asaph, Machynlleth, Holyhead, Aberdaron and Shrewsury
53				11/03/23	10.02am	15	120 (2 min)	Moelwyn Mawr		North Wales A	A2		Cerrig Cochion	N/A	115	17	SH 66127 50889	Summit 1	c 530	Trimble converted to OSGM15	538.406	SH 66146 50888					0	0.034	Trimble on ground	0	Range 5-15cm: 100.00%	Rock	Processed from nearest available five base stations - St Asaph, Machynlleth, Holyhead, Aberdaron and Shrewsury
54				11/03/23	10.27am	18	120 (2 min)	Moelwyn Mawr		North Wales A	A2		Cerrig Cochion	N/A	115	17	SH 66106 50850	Bwlch 2	c 530	Trimble converted to OSGM15	528.130 (H-H)	SH 66100 50849					N/R	0.081	N/R	0.54	Range 5-15cm: 95.47%	N/R	Processed from nearest available five base stations - St Asaph, Machynlleth, Holyhead, Aberdaron and Shrewsury
55				11/03/23	10.21am	16	120 (2 min)	Moelwyn Mawr		North Wales A	A2		Cerrig Cochion	N/A	115	17	SH 66106 50850	Bwlch 1	c 530	Trimble converted to OSGM15	528.503 (H-H)	SH 66095 50844					N/R	0.022	N/R	0.55	Range 5-15cm: 100.00%	N/R	Processed from nearest available five base stations - St Asaph, Machynlleth, Holyhead, Aberdaron and Shrewsury
56				04/03/23	1.30pm	10	120 (2 min)	Glyder Fawr		North Wales A	A1		Pt. 872.3m	N/A	115	17	SH 65872 57761	Summit 2B	c 870	Trimble converted to OSGM15	872.321	SH 65867 57758		5.3	0.61%		0	0.027	Trimble on ground	0	Range 5-15cm: 97.37%	Rock	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
57				04/03/23	1.26pm	10	120 (2 min)	Glyder Fawr		North Wales A	A1		Pt. 872.3m	N/A	115	17	SH 65872 57761	Summit 2A	c 870	Trimble converted to OSGM15	872.558	SH 65867 57758					0	N/R	Trimble on ground	0	Range 30-50cm: 88.81%	Rock	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
58				04/03/23	1.16pm	10	120 (2 min)	Glyder Fawr		North Wales A	A1		Pt. 872.3m	N/A	115	17	SH 65905 57784	Summit 1	872	Trimble converted to OSGM15	871.473	SH 65897 57780					0	0.086	Trimble on ground	0	Range 5-15cm: 58.57%	Rock	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
59				04/03/23	1.05pm	15	120 (2 min)	Glyder Fawr		North Wales A	A1		Pt. 872.3m	N/A	115	17	SH 65882 57793	Bwlch	860m - 870m	Trimble converted to OSGM15	866.977	SH 65876 57793					N/R	0.069	Trimble on ground	0	Range 30-50cm: 77.59%	N/R	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
60				04/03/23	12.43pm	18	300 (5 min)	Glyder Fawr		North Wales A	A1		Pt. 929.0m	N/A	115	17	SH 65637 57989	Summit	c 920	Trimble converted to OSGM15	929.007	SH 65625 57979		7.9	0.85%		0	0.071	Trimble on ground	0	Range 5-15cm: 100.00%	Rock	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
61				04/03/23	12.34pm	16	120 (2 min)	Glyder Fawr		North Wales A	A1		Pt. 929.0m	N/A	115	17	SH 65650 58001	Bwlch	c 920	Trimble converted to OSGM15	921.123	SH 65639 57995					N/R	0.021	Trimble on ground	0	Range 5-15cm: 54.90%	N/R	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
62				04/03/23	11.50am	13	120 (2 min)	Glyder Fawr		North Wales A	A1	3662	Castell y Gwynt	N/A	115	17	SH 65393 58176	Summit	972	Trimble converted to OSGM15	975.625 (975.681m average of two surveys)	SH 65397 58181					0	0.029	Trimble on ground	0	Range 5-15cm: 100.00%	Rock	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
63	96			16/05/2014	12.55pm	18	600 (10 min)	Glyderau	Glyder Fawr	30B		3662	Castell y Gwynt	N/A	115	17	SH 65393 58176	Summit	972	975.693	975.737 (975.681m average of two surveys)	SH 65397 58181		16	1.64%	Welsh Highland P15, Nuttall	0	0	Trimble on ground	N/A	Range 5-15cm: 100.00%	Rock	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
64				04/03/23	12.00 midday	18	300 (5 min)	Glyder Fawr		North Wales A	A1	3662	Castell y Gwynt	N/A	115	17	SH 65431 58191	Bwlch	950m - 960m	Trimble converted to OSGM15	959.717	SH 65419 58194					N/R	0.023	N/R	0.09	Range 5-15cm: 96.48%	Grass/earth	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
65				16/05/2014	1.20pm	17	300 (5 min)	Glyderau	Glyder Fawr	30B		3662	Castell y Gwynt	N/A	115	17	SH 65431 58191	Bwlch	950m - 960m	959.833	959.877	SH 65421 58194					0.1	0	Trimble on ground	N/A	Range 5-15cm: 100.00%	Grass/earth	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
66				04/03/23	10.58am	15	120 (2 min)	Glyder Fawr		North Wales A	A1		Pt. 924.4m	N/A	115	17	SH 65986 58522	Summit	913m (DataMapWales)	Trimble converted to OSGM15	924.401	SH 65975 58541		6.6	0.72%		N/R	0.059	Trimble on ground	0.25 (below summit)	Range 0.5m-1m: 51.44%	Rock	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
67				04/03/23	10.35am	15	300 (5 min)	Glyder Fawr		North Wales A	A1		Pt. 924.4m	N/A	115	17	SH 65984 58514	Bwlch	905m - 910m (DataMapWales)	Trimble converted to OSGM15	917.78	SH 65971 58536					N/R	0.024	N/R	0.46	Range 5-15cm: 91.40%	Rock	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
68				25/02/2023	10.12am	18	120 (2 min)		Moel Siabod	North Wales A	A1		Cefn y Cerrig	N/A	115	18	SH 67496 54506	Summit 2	c 500	Trimble converted to OSGM15	502.007	SH 67480 54509		10.7	2.14%	Welsh Highland Sub	0	0.019	Trimble on ground	0	Range 5-15cm: 100.00%	Grass	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Shrewsbury
69				25/02/2023	10.04am	18	120 (2 min)		Moel Siabod	North Wales A	A1		Cefn y Cerrig	N/A	115	18	SH 67496 54506	Summit 1	c 500	Trimble converted to OSGM15	501.875	SH 67480 54510					0	0.034	Trimble on ground	0	Range 5-15cm: 100.00%	Rock	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Shrewsbury
70				25/02/2023	10.42am	17	120 (2 min)		Moel Siabod	North Wales A	A1		Cefn y Cerrig	N/A	115	18	SH 67513 54410	Bwlch	490m - 500m	Trimble converted to OSGM15	491.243	SH 67511 54413					N/R	0.019	Trimble on rucksack	0.25	Range 5-15cm: 100.00%	Bog	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Shrewsbury
71	626	567	461	11/03/2018	3.11pm	11	360 (6 min)	Moelwynion	Moel Siabod	North Wales A	A1	1980	Moel Siabod		115	18	SH 70528 54633	Summit	872	Trimble converted to OSGM15	872.201	SH 70524 54631		599.9	68.68%	Marilyn, Hump, Simm, Hewitt, Uchaf, Nuttall, 800m Twmpau, Dominant	0	0	Trimble on ground	0	Range 5-15cm: 100.00%	Large rock	Processed from nearest available five base stations - St Asaph, Machynlleth, Holyhead, Aberdaron and Shrewsbury
72				25/02/2023	8.57am	15	300 (5 min)	Moel Siabod		North Wales A	A2	1980	Moel Siabod	N/A	115	18	SH 66071 55625	Bwlch 2	272 (Geo)	Trimble converted to OSGM15	272.501	SH 66048 55597					N/R	0.062	Trimble on rucksack	0.24	Range 30-50cm: 98.64%	Bog	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Shrewsbury
73				25/02/2023	8.44am	15	300 (5 min)	Moel Siabod		North Wales A	A2	1980	Moel Siabod	N/A	115	18	SH 66071 55625	Bwlch 1	272 (Geo)	Trimble converted to OSGM15	272.305	SH 66046 55602					N/R	0.068	Trimble on rucksack	0.25	Range 5-15cm: 100.00%	Bog	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Shrewsbury
74				17/09/2017	8.43am	7	300 (5 min)	Moelwynion	Moel Siabod	North Wales A	A1	1980	Moel Siabod	N/A	115	18	SH 66071 55625	Bwlch	272 (Geo)	Trimble converted to OSGM15	272.314	SH 66044 55603					0.1	0	Trimble on rucksack	0.47	Range 5-15cm: 100.00%	Bog	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Shrewsbury
75				28/01/2023	11.06am	10	300 (5 min)	Carnedd Llywelyn		North Wales A	A1		Craig Eigiau	N/A	115	17	SH 71278 64675	Summit	c 670	Trimble converted to OSGM15	688.441	SH 71280 64670		10.2	1.48%	Welsh Highland Sub	0	0.035	Trimble on ground	0	Range 5-15cm: 100.00%	Rock	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
76				28/01/2023	11.27am	10	120 (2 min)	Carnedd Llywelyn		North Wales A	A1		Craig Eigiau	N/A	115	17	SH 71230 64633	Bwlch 2	c 670	Trimble converted to OSGM15	678.545 (H-H)	SH 71185 64666					N/R	0.087	Trimble on rucksack	0.32	Range 15-30cm: 65.13%	Grass	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
77				28/01/2023	10.49am	18	120 (2 min)	Carnedd Llywelyn		North Wales A	A1		Craig Eigiau	N/A	115	17	SH 71230 64633	Bwlch 1	c 670	Trimble converted to OSGM15	678.236 (H-H)	SH 71218 64674					N/R	0.019	Trimble on rucksack	0.25	Range 5-15cm: 72.78%	Grass	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
78				21/01/2023	12.42pm	17	120 (2 min)	Moelwyn Mawr		North Wales A	A2		Pt. 524.3	N/A	124	18	SH 66126 45796	Summit	c 520	Trimble converted to OSGM15	524.281	SH 66117 45783		10.7	2.05%	Welsh Highland Sub	0	0.03	Trimble on ground	0	Range 5-15cm: 96.21%	Rock	Processed from nearest available five base stations - Machynlleth, St Asaph, Aberdaron, Holyhead and Shrewsbury
79				21/01/2023	1.26pm	14	180 (3 min)	Moelwyn Mawr		North Wales A	A2		Pt. 524.3	N/A	124	18	SH 66047 45726	Bwlch 2	510m - 520m	Trimble converted to OSGM15	514.393	SH 66129 45778					N/R	0.022	Trimble on rucksack	0.23	Range 5-15cm: 100.00%	Grass	Processed from nearest available five base stations - Machynlleth, St Asaph, Aberdaron, Holyhead and Shrewsbury
80				21/01/2023	1.14pm	14	240 (4min)	Moelwyn Mawr		North Wales A	A2		Pt. 524.3	N/A	124	18	SH 66047 45726	Bwlch 1	510m - 520m	Trimble converted to OSGM15	513.543	SH 66131 45774					N/R	0.035	Trimle on wall	0.79	Range 5-15cm: 76.41%	Ground at base of wall	Processed from nearest available five base stations - Machynlleth, St Asaph, Aberdaron, Holyhead and Shrewsbury
81				21/01/2023	11.10pm	15	300 (5 min)	Moelwyn Mawr		North Wales A	A2		Craig Ysgafn	Craigysgafn	124	18	SH 65972 44402	Summit	c 680	Trimble converted to OSGM15	688.33	SH 65973 44394		10.3	1.49%	Welsh Highland Sub	0	0.097	Trimble on ground	0	Range 5-15cm: 90.21%	Rock	Processed from nearest available five base stations - Machynlleth, St Asaph, Aberdaron, Holyhead and Shrewsbury
82				21/01/2023	10.54am	14	300 (5 min)	Moelwyn Mawr		North Wales A	A2		Craig Ysgafn		124	18	SH 65973 44379	Bwlch	670m - 680m	Trimble converted to OSGM15	678.049	SH 65960 44382					N/R	0.027	Trimble on rucksack	0.2	Range 30-50cm: 93.78%	Grass	Processed from nearest available five base stations - Machynlleth, St Asaph, Aberdaron, Holyhead and Shrewsbury
83	1046	943		21/01/2023	9.35am	8	120 (2 min)	Moelwyn Mawr		North Wales A	A2		Craig Stwlan	N/A	124	18	SH 66737 44653	Summit	568	Trimble converted to OSGM15	568.413	SH 66736 44654		20.1	3.53%	Welsh Highland P15, 500m Sub-Twmpau	0	0.025	Trimble on ground	0	Range 5-15cm: 95.07%	Rock	Processed from nearest available five base stations - Machynlleth, St Asaph, Aberdaron, Holyhead and Shrewsbury
84				21/01/2023	9.47am	14	120 (2 min)	Moelwyn Mawr		North Wales A	A2		Craig Stwlan	N/A	124	18	SH 66707 44713	Bwlch	540m - 550m	Trimble converted to OSGM15	548.331	SH 66693 44717					N/R	0.02	Trimble on rucksack	0.44	Range 5-15cm: 97.06%	Ground below snow	Processed from nearest available five base stations - Machynlleth, St Asaph, Aberdaron, Holyhead and Shrewsbury
85	1046	942		06/01/2023	3.31pm	10	120 (2 min)	Cefn yr Ystrad		South Wales B	B5		Carreg Croes Ifor	N/A	161	13	SO 24677 10698	Summit	505m (One-Inch)	Trimble converted to OSGM15	509.733	SO 24848 10663		27.6	5.42%	Subdodd, Welsh Highland P15, 500m Sub-Twmpau	N/R	0.045	Trimble on rucksack	0.18	Range 5-15cm: 100.00%	Heather	Processed from nearest available five base stations - Brecon, Cardiff, Shobdon, Stroud and Swansea
86				06/01/2023	3.18pm	10	120 (2 min)	Cefn yr Ystrad		South Wales B	B5		Carreg Croes Ifor	N/A	161	13	SO 24647 10735	Summit	c 500	Trimble converted to OSGM15	507.059	SO 24681 10761		12.7	2.51%	Welsh Highland Sub	N/R	0.032	Trimble on ground	0	Range 5-15cm: 100.00%	Grass covered summit of a dumped mound of earth and rock.	Processed from nearest available five base stations - Brecon, Cardiff, Shobdon, Stroud and Swansea
87	1045	941	765	06/01/2023	1.46pm	10	600 (10 min)	Cefn yr Ystrad		South Wales B	B5	3532	Blorens	Blorenge	161	13	SO 26997 11863	Summit	561	Trimble converted to OSGM15	558.934	SO 26974 11830		132.0	23.62%	Hump, Dodd, Welsh Highland P15, Dewey, 500m Twmpau	0	0.061	Trimble on ground	0	Range 5-15cm: 100.00%	Rock outcrop	Processed from nearest available five base stations - Brecon, Cardiff, Shobdon, Stroud and Swansea
88	281	256		04/06/2015	2.16pm	9	300 (5 min)	Y Llethr		North Wales A	A2	2064	Crib y Rhiw	Crib-y-rhiw	124	18	SH 66373 24873	Summit	c 670	681.241	681.274	SH 66368 24868		29.2	4.28%	Pellennig, Subsimm, Sub-Hewitt, Nuttall, Welsh Highland P15, 600m Sub-Twmpau	0.01	0	Trimble on ground	0	Range 5-15cm: 100.00%	Embedded rock	Processed from nearest available five base stations - Aberdaron, St Asaph, Holyhead, Aberporth and Shrewsbury
89				02/01/2023	2.21pm	18	120 (2 min)	Y Llethr		North Wales A	A2	2064	Crib y Rhiw	Crib-y-rhiw	124	18	SH 66134 25251	Bwlch	650m - 660m	Trimble converted to OSGM15	652.107	SH 66080 25302					N/R	0.028	Trimble on rucksack	0.19	Range 5-15cm: 98.63%	Grass	Processed from nearest available five base stations - Machynlleth, Aberdaron, St Asaph, Holyhead and Aberporth
90				02/01/2023	1.23pm	19	120 (2 min)	Y Llethr		North Wales A	A2		Pt. 687.5m	N/A	124	18	SH 66663 23885	Summit	688	Trimble converted to OSGM15	687.464	SH 66665 23885		12.4	1.80%	Welsh Highland Sub	0	1.01	Trimble on ground	0	Range 30-50cm: 88.24%	Rock	Processed from nearest available five base stations - Machynlleth, Aberdaron, St Asaph, Holyhead and Aberporth
91				02/01/2023	1.03pm	18	120 (2 min)	Y Llethr		North Wales A	A2		Pt. 687.5m	N/A	124	18	SH 66467 23830	Bwlch	670m - 680m	Trimble converted to OSGM15	675.086	SH 66468 23837					N/R	0.12	Trimble on stone wall	1.53	Range 30-50cm: 44.86%	Grass at base of stone wall	Processed from nearest available five base stations - Machynlleth, Aberdaron, St Asaph, Holyhead and Aberporth
92				26/12/2022	12.35pm	14	120 (2 min)	Glyder Fawr		North Wales A	A1		Tryfan	N/A	115	17	SH 66398 59328	Summit	910	Trimble converted to OSGM15	910.786	SH 66393 59332		9.2	1.01%		0	0.024	Trimble on ground	0	Range 5-15cm: 100.00%	large flat-topped rock with deep fissures	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
93				26/12/2022	12.23pm	14	120 (2 min)	Glyder Fawr		North Wales A	A1		Tryfan	N/A	115	17	SH 66377 59368	Bwlch	900m - 910m	Trimble converted to OSGM15	901.624	SH 66378 59359					N/R	0.21	N/R	0.5	Range 30-50cm: 43.06%	Boulders with deep gaps, offset taken to possible bedrock	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
94				26/12/2022	11.31am	8	120 (2 min)	Glyder Fawr		North Wales A	A1		Tryfan	N/A	115	17	SH 66418 59482	Summit	c 890	Trimble converted to OSGM15	900.039	SH 66422 59485		12.5	1.39%	Welsh Highland Sub	0	0.0012	Trimble on ground	0	Range 5-15cm: 83.15%	Rock pinnacle	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
95				26/12/2022	11.53am	10	120 (2 min)	Glyder Fawr		North Wales A	A1		Tryfan	N/A	115	17	SH 66385 59443	Bwlch	880m - 890m	Trimble converted to OSGM15	887.523	SH 66385 59441					N/R	0.061	N/R	0.38	Range 5-15cm: 38.78%	Narrow rock bridge above gully	Processed from nearest available five base stations - St Asaph, Holyhead, Machynlleth, Aberdaron and Daresbury
96				16/07/2022	10.00am	20	360 (6 min)	Carnedd Wen		North Wales A	A3	14932	Panylau Gwynion		125	215	SH 93575 06311	Summit 2	451	Trimble converted to OSGM15	449.147	SH 93575 06303					0.6	0.053	Trimble on rucksack	0.61	Range 30-50cm: 98.44%	Felled forestry	Processed from nearest available five base stations - Machynlleth, Shrewsbury, Shobdon, St Asaph and Brecon
97	1044	940	764	16/07/2022	9.33am	16	660 (11 min)	Carnedd Wen		North Wales A	A3	14932	Panylau Gwynion	N/A	125	215	SH 93561 06363	Summit 1	c 450	Trimble converted to OSGM15	450.324	SH 93557 06357		38	8.51%	Pedwar	0.07	0.052	Trimble on rucksack	0.38	Range 5-15cm: 100.00%	Tussocky, heathery knoll	Processed from nearest available five base stations - Machynlleth, Shrewsbury, Shobdon, St Asaph and Brecon
98	1043	939	763	16/07/2022	8.23am	15	600 (10 min)	Carnedd Wen		North Wales A	A3	14963	Carreg y Frân	N/A	125	215	SH 93828 05403	Summit	436 (Geo)	Trimble converted to OSGM15	436.087	SH 93822 05394	c	39	8.96%	Pedwar	0.8	0.044	Trimble on rucksack	0.44	Range 5-15cm: 100.00%	Undulating ground amongst conifer saplings	Processed from nearest available five base stations - Machynlleth, Shrewsbury, Shobdon, St Asaph and Brecon
99	1042	938	762	09/07/2022	1.05pm	18	520 (9 min)	Banc Llechwedd Mawr		South Wales B	B1	3462	Banc yr Ŵyn	N/A	135	23	SN 74179 90224	Summit	503	Trimble converted to OSGM15	501.486 (501.693m LIDAR height prioritised)	SN 74193 90211 (SN 74195 90213 LIDAR position prioritised)	c	74	14.69%	Dodd, Dewey, Uchaf, 500m Twmpau	0.1	0.036	Trimble on rucksack	0.41	Range 5-15cm: 100.00%	Grass	Processed from nearest available five base stations - Machynlleth, Aberporth, Aberdaron, Brecon and Shobdon
100	1041	937	761	09/07/2022	10.40am	18	300 (5 min)	Banc Llechwedd Mawr		South Wales B	B1	14994	Disgwylfa Fach	N/A	135	213	SN 73650 83883	Summit	416	Trimble converted to OSGM15	414.203	SN 73653 83882		38.8	9.36%	Pedwar	0.06	0.035	Trimble on rucksack	0.43	Range 5-15cm: 100.00%	Long grass	Processed from nearest available five base stations - Machynlleth, Aberporth, Brecon, Shobdon and Aberdaron