...Quarry
Simple magnetic cache in what used to be a quarry and is now a housing development sited around a couple of lagoons. It is also where I live!
When we moved in we noticed some evidence of the old quarry railway, namely a signal gantry, a level crossing gate and some track that can be seen by the bridge onto Frenches Road. More info online, search British Industrial Sand Redhill or visit www.railalbum.co.uk/industrial-railways/bis-redhill.htm