Camerton Colliery Drift 54 39'52.08N 3 29'19.32W
After the colliery closed it was used for storage of ammunition and on my last visit still had a sentry post by the portal. I'm not sure whether it ever connected up with Birkhill Colliery at the RNAD Broughton Moor but the drift ran right under the complex! I was told someone had accessed the mine last year.
"Someone" may well have entered last year but in the strongest possible terms it should be avoided. If anyone had hypothetically entered they would probably tell you something like this about the place-
There are two falls at the end of the brick lined adit both passable but air quality deteriorates rapidly beyond the falls. Infact oxygen drops to 10.4%, it will kill you very quickly.
The persons who (allegedly) did this trip used Breathing Apparatus which is no mean feat to get through the falls with. Even with massive amounts of equipment not much distance into the mine was achieved. Probably less than 600 yeards beyond the 2nd fall.
Roof level is low and uncomfortable, the walls are whitewashed and the floor levelled, brick arch re-inforcing is used in places and storage bays are signed. There is an emergency exit signposted to the other adit but there is a collapse that is impossible to negotiate with BA kit and there is insufficient oxygen to get through alive.
It does continue directly toward Birkhill but it is not know if it connects, it certainly appears to travel far enough in the right direction to be feasable.
It has undoubtedly been used by the WD at some point.
Non of the above should be in anyway interpretted that doing this mine is remotely feasable, it isn't. With several grands worth of equipment per man the expedition was of very very limited success. Even with all the equipment survival prospects are low.
Please take my word for it, its just not worth the risk of going in there. Not much to see and a good prospect of getting yourself very very dead.