In reply to Ed morris:
Hi As noted in the other thread about a loose flake/bolts damaged on slate.
The 'volunteers' that have been involved in this are all busy, as most of them see seasonal fluctuation in their work and now is the busy season.
There are sadly no bolting fairies and this job alone would probably take two days of time what with collecting the equipment from the NWBF and then returning. All that driving about is at their own expense and done on their days off.
Volunteers gave about 12 days of their time in march/april and you can see a overview of what they have done as well as note other problem bolts around the quarries on the page linked below.
http://snowdoniamountainguides.com/Routes-Topos-Resources/Fixed-Gear.php
I hope you have posted the hanger back to the NWBF, it is quite hard to remove the bolt without at least the bolt on it BTW!