Simm update

Alan Dawson

February 2020

A Simm is a six-hundred metre summit in Britain with a drop of 30 metres all round. The name was changed from Sim to Simm in December 2015. At the end of 2019 there were 2531 Simms.

Simms were introduced as a hill category in 2010, to incorporate and rationalise an unwieldy assortment of several categories, including Murdos, Corbett Tops (CTs), Graham Tops (GTs), SubGTs, Welsh Hewitts, English Hewitts and Subhewitts. These hill listings were published in a series of five TACit Tables published by TACit Press from 1995 to 2004. This update summarises the changes to these TACit Tables since publication:

TACit Table	Year	Total then	Total at end 2019
The Murdos	1995	444	442
Corbetts Tops and Corbetteers	1999	668	675
Graham Tops and Grahamists	2004	999	1001
600-609.6m in Scotland	2004	74	73
The Hewitts and Marilyns of Wales	1997	137	136
600-609.6m in Wales	1997	15	14
The Hewitts and Marilyns of England	1997	178	179
600-609.6m in England	1997	14	13
Total Simms		2527	2531

Windy Gyle and The Schil are on the Scotland / England border and are counted only once in the overall total.

Additions

The following Simms have been discovered since 2004. Height and drop are given to the nearest 0.1m if they are derived from accurate hill surveys.

Number	Section	Height	Name	Map	Drop	Grid Ref
5645	01A	648.3	Sron Mhor	51	32.4	NN642272
5721	01C	834.8	Creag na h-Iolaire	56	30.2	NN427153
5729	01C	710.5	Stob Glas	50,56	30.9	NN365200
5738	01C	661.7	Meall an Lochain	51	30.3	NN511237
5745	01C	619.2	Creag na h-Iolaire	51	31.7	NN561257
5787	01D	751.9	Ben Vane Far North Top	50,56	31.0	NN274110
5812	02A	756.6	Meallanan Odhar	51	30.8	NN679531
5819	02A	650.9	Meall nam Maigheach North Top	51	30.4	NN561510
155	02B	951.4	Beinn nan Eachan East Top	51	30.1	NN574383
5843	02B	892.5	Cam-Chreag	51	31.3	NN524398
3664	03A	906.2	Aonach Eagach East Top	41	33.1	NN155582
5874	03B	734.2	Sgorr Dhonuill Far West Top	41	30.9	NN024565
5982	06A	792.1	Carn Dearg	35,43	33.1	NN812904
5985	06A	756.5	An Sgarsoch Far East Top	43	36.0	NN961851
6006	06B	817.6	Carn Bhac South Top	43	30.5	NO042809
6054	07A	864.6	Carn Ait	43	32.0	NO142734
6154	08A	783.0	Carn Ban Mor West Top	36	30.8	NN875979
6169	08B	721.4	Little Garvoun	36	31.4	NJ132090
6203	09A	602.6	Cnapan a' Choire Odhair Mhoir	36	36	NH904299
6233	09B	875.8	Carn na Criche	35	33.1	NH576008
6264	09B	650.2	Sith Mor	35	30.9	NH714172
4267	10A	633.4	Beinn Aoidhdailean	33	33.3	NG886140
4270	10A	614.1	Sgurr Mor Near West Top	33	31.4	NG875079
6375	10B	876.4	Sgurr a' Choire-bheithe East Top	33	31.7	NG900012
6381	10B	801.3	Meall Coire na Gaoithe an Ear	33	30.6	NM867997
891	12A	1005.2	Creag Toll a 'Choin	25	402	NH130453
1016	14A	960.4	Glas Mheall Liath	19	32.4	NH077841
6855	17B	829.7	Caisteal a' Garbh-choire	32	31.7	NG454202
19199	18A	829.3	Druim Fiaclach East Top	40	30.9	NM799790
6962	19C	645.4	Cruach Fhiarach	56	31.4	NN256029
6999	20C	653.2	Meall Donn	69	30.4	NR906450
2078	30D	614.4	Foel Penolau	124	31.9	SH661348
19413	30E	667.5	Foel Cedig	125	180	SH981283
2522	34C	862.9	Striding Edge	90	31.2	NY350149

Sgurr Mor Far West Top (10A) was added in 2012 but removed after a survey in 2015. Carn Leac East Top (9B) was added in 2004 but removed after a survey in 2019.

Demotions

The following hills listed in TACit Tables have less than 30m drop or are under 600m high and are not Simms.

Number	Section	Height	Name	Map	Drop	Grid Ref
5655	01A	598.2	Creag Liath	52	29.5	NN913334
3930	01B	753.6	Leacann Amarach	57	29.2	NN615164
3961	01C	707.0	Meall Sgallachd	51	28.8	NN553259
2984	02B	808.4	Meall Eoghainn	51	29.8	NN468323
2989	03A	866.3	Stob Dubh	41	28.2	NN151588
193	03B	1106.9	Stob Coire nam Beith	41	28.1	NN138546
246	03C	995.5	Stob a' Ghlais Choire	41	25.8	NN239516
4029	03C	746.8	Creag Dhubh	41	28.8	NN258520
4060	06A	753.5	An Sgarsoch East Top (superseded)	43	27.9	NN953847
4090	06B	706.7	Meall na h-Eilrig	43	28.9	NN975716
3090	07A	871.9	Crow Craigies South Top	44	28.6	NO229790
6119	07B	604.9	Craigangower	44	26.4	NO539753
630	09B	909.9	Meall a' Bhothain	35	29.6	NH663056
3132	09B	854.9	Sron a' Bhuirich	34	28.0	NN423978
4252	09B	612.0	An Torr	35	29.8	NN686983
3176	09C	888.0	Carn Dearg	34,42	29.8	NN410893
890	12A	1004.9	Maoile Lunndaidh (superseded)	25	10.5	NH135458
4366	12B	713	Sgorr na Diollaid Far West Top (point 713m)	25	28	NH264359
947	12B	598.7	Meallan Odhar Doire nan Gillean	25	177	NH156377
3267	15A	883.8	Beinn Dearg North Top	20	29.2	NH266819
3660	15B	688.8	Sidhean a' Choin Bhain	21	29.7	NH600803
4466	16B	715.1	Carn an Tionail	10	29.6	NC575476
1136	16B	599.7	Meallan Liath	9	147.3	NC514503
1257	17B	926.6	Blabheinn South Top	32	28.1	NG528215
4508	18A	677.4	Sgurr Dhomhuill Beag	40	29.3	NM743756
4535	19C	643.4	Beinn Lochain East Top	56	26.2	NN164003
1991	30B	793.7	Bera Mawr	115	29.7	SH674682
2105	30E	666.2	Cyrniau Nod (superseded)	125	8	SH988279
2143	30F	683.7	Gau Graig	124	25.4	SH743141
2240	32A	716.7	Fan y Big	160	28.5	SO036206
2531	34C	794.0	Green Side	90	28.8	NY352187

Suie Dhu (11A) was demoted in 2013 but reinstated after a survey in 2014. Carn Chomh-Stri (7A) may have less than 30m drop, but remains a Simm pending a resurvey to confirm the result.

Summit changes

There have been several summit relocations where the highest point has been changed to a nearby grid reference on the same hill. Selected new heights and grid references are shown below.

Number	Section	Height	Name	Map	Drop	Grid Ref
3924	01A	620.3	Meall nam Fiadh (was Creag Odhar)	51	67.7	NN691272
3925	01A	618.6	Meall nam Fiadh Far East Top	51,52	46.1	NN707272
3949	01B	617.9	Sron na Maoile	57	36.5	NN690177
3983	01D	629.9	Beinn Bhreac	50,56	92.8	NN202216
3994	02A	736.5	Creag an Loch	52	95.7	NN823544
3041	06A	887.0	Elrig 'ic an Toisich	43	34.2	NN865788
4249	09B	633.2	Carn Glac an Eich	26,35	81.8	NH694267
744	10B	897.5	Sgurr nan Eugallt	33	612	NG927048
4276	10B	740	Meall a' Choire Dhuibh	33,40	101	NM917979
994	13B	667.8	Carn Breac	25	392	NH046531
996	13B	626.8	Beinn na Feusaige	25	227.9	NH090542
4550	21A	718.4	The Socach	37	87	NJ279145
1754	27C	664.4	Scaw'd Law	78	57.5	NS922037
1836	28B	800.8	Lochcraig Head	79	108	NT166177
1852	28B	729.9	Swatte Fell	78	36.3	NT118113
2145	30F	678.5	Maesglase	124,125	318	SH817150
5603	32A	802.6	Fan Brycheiniog	160	424	SN824220
2793	35B	628.0	Gragareth	98	32.8	SD687793

The summit of The Saddle was moved to the rock next to the trig pillar in 2013 but moved back to its original correct location following a survey in 2014. The summit of An Dun was moved back to its original location (the south summit) following a GNSS survey in 2016 that supported the result of a 2009 survey, although the difference was only 1-3cm.

Name changes

Numerous Simms have been renamed since the publication of TACit Tables. Selected changes are shown below.

Number	Section	Height	Name	Map	Grid Ref	Drop
3937	01B	708.3	Creag na h-Eararuidh (was Stuc na Cabaig)	57	NN685190	353
2925	01C	941.4	Beinn a' Chroin (was Beinn a' Chroin West Top)	50,56	NN387185	137.1
36	01C	940.1	Beinn a' Chroin East Top (was Beinn a 'Chroin)	50,56	NN393185	63.1
2973	02A	796.5	Creag a' Chaorainn (was Meall Phubuill)	51	NN442438	90.4
3096	07A	845.5	Craig Damff (was Cairn Damff)	44	NO247777	33.6
1077	15A	666.3	Beinn Bhreac (was Meall Dubh)	20	NH225886	158.8
4428	15A	646	Meall Dubh (was Meall Dubh North Top)	20	NH214900	54
1294	17D	702	Trollabhal (was Trallval)	39	NM377952	190
2126	30E	607.8	Y Garn (was Glan-hafon)	125	SJ080272	84
2128	30E	600.8	Cefn Perfedd (was Moel yr Henfaes East Top)	125	SJ099373	32.3
2149	30F	661	Craig-las (was Tyrrau Mawr)	124	SH677135	103
2164	31A	684	Drum Peithnant (was Y Garn)	135	SN775851	56
2770	35A	609.6	Thack Moor (was Renwick Fell)	86	NY611462	58

Significant height changes

There have been changes to the height of numerous Simms since the TACit Tables were published. Current details are available in the Database of British and Irish Hills and via the hill-bagging.co.uk website. Some notable height or drop changes are shown below.

Section	Old	New	Name	Map	Grid Ref	Drop
1B	705	708.3	Creag na h-Eararuidh	57	NN685190	353
1B	706	706.6	Beinn Dearg	57	NN696197	73.4
1D	870	852.4	Stac a' Chuirn	50,56	NN190180	34.9
2B	1118	1123.1	Meall Garbh	51	NN644437	198
2B	1118	1117.1	An Stuc	51	NN638431	126
2B	916	914.3	Creag na Caillich	51	NN562377	69.3
3C	1009	1024.3	Drochaid Ghlas	50	NN083307	90.5
5B	914	914.6	Carn na Caim South Top	42	NN663806	30.4
7A	611	609.1	Corwharn	44	NO288651	152
8B	862	863.0	Creag an Dail Bheag	36,43	NO157981	211
8B	862	861.5	Carn Liath	36,43	NO164976	33.2
10A	885	885.5	Buidhe Bheinn	33	NG963090	160
10A	885	885.2	Sgurr a' Bhac Chaolais	33	NG958110	121
12A	915	913.4	Sgurr nan Ceannaichean	25	NH087480	185
13B	762	761	A' Chioch	24	NG810446	38
14A	916	914.1	Beinn a' Chlaidheimh	19	NH061775	268
17B	912	914.3	Knight's Peak	32	NG471254	41.7
17B	898	900.1	Sgurr a' Bhasteir	32	NG464257	30.1
17C	610	609.0	Ben Aslak	33	NG750191	329
19C	761	763.5	Cnoc Coinnich	56	NN233007	273.5
19C	658	658.3	Stob na Boine Druim-fhinn	56	NN168025	149.4
21A	610	609.1	Ladylea Hill	37	NJ343168	200.9
27B	786	786.8	Kirriereoch Hill	77	NX420869	150.2
27C	608	611.5	Dugland	77	NS602009	45.9
30B	999	1000.8	Glyder Fawr	115	SH642579	642
30B	609	609.8	Mynydd Graig Goch	115,123	SH497485	71
30E	620	630.1	Pen yr Allt Uchaf	124,125	SH871196	70
35A	609	609.6	Thack Moor	86	NY611462	58
35B	609	610.4	Birks Fell	98	SD918763	158

Lowest Simms

These Simms are less than 601m high.

Section	Height	Name	Map	Grid Ref	Drop
09B	600.4	Beinn Bhreac	35	NH757276	33.4
17E	600.8	Cruachan Beag	47,48	NM578338	34.4
27C	600.5	Hare Hill	71,77	NS654097	74
30B	600.2	Foel Lwyd	115	SH720723	51
30E	600.8	Cefn Perfedd	125	SJ099373	32.3
30E	600.4	Y Gribin	124,125	SH843177	34.1
32C	600	Craig y Llyn	170	SN906031	392
34D	600	Black Combe	96	SD135854	362

Subsimms

A Subsimm is a hill at least 600m high with a drop all round of 20-29.9m. There are currently 682 Subsimms. Over half of these have been surveyed to show that they have less than 30m drop. There are still several unsurveyed hills with a drop of 28m-32m, so there will be further changes to the Simms and Subsimms in future.

Simm Hall of Fame

Membership of the Simm Hall of Fame is open to anyone who has climbed over 2000 Simms. By the end of 2019 there were fourteen members. A further 24 people have reported climbing over 1500 Simms and have therefore entered the Corridor that leads to the Simm Hall of Fame. Anyone eligible to join the Hall or Corridor should contact the author via email to rhb@rhb.org.uk.

Acknowledgments

Thanks are due to Myrddyn Phillips for surveys of Foel Penolau, Foel Cedig, Cyrniau Nod, Bera Mawr, Fan y Big and other Simms or Subsimms, and to GJ Surveys for their survey of Gau Graig. All other surveys leading to changes in Simm status have been carried out by Alan Dawson. Thanks also to Jim Bloomer, Chris Crocker and Mark Jackson, who have helped to discover potential new Simms or new summits for existing Simms by studying OS maps or Lidar data.