Bolts at Harrison's Rocks and Stone Farm are funded by the BMC and installed and tested by members of the HRMG or those appointed by them. 
The Harrison's Rock Management Group test and inspect those bolts once every 3 years. This involves weighting each bolt while closely observing them for movement.
You must never attempt to place bolts yourself.
If you encounter any problems with bolts on Sandstone or have any questions then, please email the BMC:
Email: access@thebmc.co.uk
or
Call: 0161 438 3309
Bolts at other crags have been installed through prior arrangement and are installed and monitored by authorised personel. Bowles Rocks undertakes its own program of bolt installation and testing.
Please note that bolts used on sandstone are much longer than your average sport climbing bolt and are often installed with an additional backup bolt.
Excerpt from the Southern Sandstone Climbs Rockfax Guide.
"There are many bolts on sandstone and all of them have been placed purely as top-rope anchors at the top of crags. There are no bolts actually on routes and they are never used to protect lead climbing.
Bolts on sandstone should not be regarded in the same way as bolts for leading climbing on limestone or other rock types. The softness of the rock means that there are special requirements when placing the bolts and they must not be used for any purpose other than setting up top-ropes. They are not designed for slacklines, zip wires or via ferrata. Excessive force placed on a bolt in the wrong direction may end up with the rock surrounding it failing and exploding in a sandy mess."
Bolting Updates:
Harrison's Rocks - Bolting Project 2019/2020 Stage 1 - 13/14/04.2019
1. Mantelpiece - Panther's Wall - RF Page 189
2. Blue Peter - Panther's Wall - RF Page 189
3. Blue Murder - Slab Area - RF Page 191
4. Quarterdome - Giant's Staircase - RF Page 201
5. Left Edge / Original Route - Pig Tail Slabs - RF Page 206
6. Big Toe Wall / Greasy Eliminate - Pig Tail Slabs - RF Page 206
7. Greasy Crack - Pig Tail Slabs - RF Page 207
Harrison's Rocks - Bolting Project 2019/2020 Stage 2 - 12.05.2019
8. Greasy Eliminate R / Directors - Pig Tail Slabs - RF Page 207
9. Big Cave Route 2 / Right Under Your Nose - The Cave - RF Page 253
10. Forget-me-Not - Spider Wall - RF Page 254
11. Spider Wall - Spider Wall - RF Page 254
12. Wanderfall / Wander at Leisure - Wanderfall - RF Page 260
13. Birch Tree Wall + Variation - Birch Tree Wall - RF Page 262
Harrison's Rocks - Bolting Project 2019/2020 Stage 3 - 01.06.2019
14. Wailing Wall - Isolated Buttress - RF Page 249
15. Biceps Buttress - Finger Popper - Crucifix Wall - RF Page 259
16. Crucifix / Hector's House - Crucifix Wall - RF Page 259
17. Corner - Crucifix Wall - RF Page 259
18. Mischivas / Philippa - Crucifix Wall - RF Page 259
19. Mister Splodge - Birch Tree Wall - RF Page 262
20. Tree Root - Birch Tree Wall - RF Page 262 (ish)
Harrison's Rocks - Bolting Project 2019/2020 Stage 4 - 06.06.2019
21. Pullover - The Scoop Area - RF Page 264
22. Solstice - Unclimbed Wall - RF Page 267
23. Hangover 3 - Long Layback Area - RF Page 194
25. Rotten Stump Wall - Rotten Stump Wall - RF Page 158
26. Directors/Giant's Ear - Pig Tail Slabs - RF Page 207
27. Small Wall - Circle Area - RF Page 213
28. Belts and Braces - Wellington Boot - RF Page 231
29. Unclimbed Wall (Back Bolt) - Unclimbed Wall - RF Page 266
Stone Farm - Bolting Work 05.06.2021 - 05.06.2021
30. Moss Wall Left Block - Moss Wall - RF Page 452
31. Cat Wall - Cat Wall - RF Page 456
32. Stone Farm Crack - Pine Buttress - RF Page 457
33. Pine Buttress - Pine Buttress - RF Page 457
34. Pine Crack - Pine Buttress - RF Page 457
35. The Face - Pine Buttress - RF Page 457
Harrison's and Stone Farm Swaging Removal. - 23 to 26.09.2021
All Bolts.
Removals - Part of Stage 3 and 4
1. Unclimbed Wall (Old Old Front Bolt) - Unclimbed Wall - RF Page 266
2. Forget-me-Not - Spider Wall - RF Page 254
3. Hangover 3 (Old Set) - Long Layback Area - RF Page 194
1. Unclimbed Wall (Old Old Front Bolt) - Unclimbed Wall - RF Page 266
2. Forget-me-Not - Spider Wall - RF Page 254
3. Hangover 3 (Old Set) - Long Layback Area - RF Page 194
Removals - 30.05.2021
1. Unclimbed Wall (Back Bolt) - Unclimbed Wall - RF Page 266
1. Unclimbed Wall (Back Bolt) - Unclimbed Wall - RF Page 266
2. Belts and Braces - Wellington Boot - RF Page 231
Fixes - Part of Stage 4
1. Coffin Corner - Circle Area - RF Page 213
2. Stupid Effort - What Crisis - RF Page 204
1. Coffin Corner - Circle Area - RF Page 213
2. Stupid Effort - What Crisis - RF Page 204
Fixes - 30.05.2021
1. Slab Direct (Back Bolt) - Slab Area - RF Page 191
1. Slab Direct (Back Bolt) - Slab Area - RF Page 191