Roc Lockton is a Royal Observer Corps post in the North Yorkshire Moors National Park at Lockton near Pickering.
The main hatch is broken, the far ventilation shaft damaged with the louvers missing and a hole in the side.
Inside the post is dry, two bed frames remain with car seats added. The pump remains but the pipe is missing. Graffiti is painted on the walls in red paint.
A brick aircraft observation post is close by which contain a single bunk bed and a stripped crew room.
Royal Observer Corps (ROC) were given the responsibility of reporting nuclear bursts and monitoring fall-out. This was archived by the construction of underground monitoring posts throughout Great Britain and Northern Ireland. These were designed to give limited fall-out protection, usually at the same location as the aircraft monitoring post.
These posts are basic, with no mains electricity or running water. Toilet facilities were basic in the extreme consisting of a chemical toilet in a small room just off the main entrance. This entrance is a 15ft shaft, dropping down to a large monitoring room, approximately 15ft by 7ft in size. These bunkers were built to a standard design. The furniture was also standardised inside the bunkers. A ventilation shaft with two louvered vents was located alongside the entrance shaft with a second air shaft at the other end of the room. Lighting was provided by a 12 volt battery located behind the monitoring room door.