it's part of the smaller separated workings at bedlams. it was originally part of the network that ran under the m23. alot was filled when a digger collapsed through the surface! the main bedlams bank workings are further east. the entry points are gated and locked, do not attempt to open the locks yourself it is not worth the agro... (they will find you, and they will ruin your fun) contact wcms or Peter burgess who I am sure will be more than happy to let you have a tour and take some photos. the same goes for godstone main series but not until after the bat hibernation period!! all the local quarrys are awesome and deserve the highest level of respect. Surrey has ALOT to offer!