On board the County class guided missile destroyer London (1961) alongside the fitting out berth at the Neptune Works of Swan, Hunter & Wigham Richardson Ltd at Wallsend-on-Tyne. The ship is berthed starboard side to the quay. The photographer is in the Seaslug missile launcher electrical gear compartment between 173 and 178 stations on the port side of 3 deck looking forward and to starboard showing the bearing and elevating power unit with a motor generator mounted above it. Next to it is a metadyne. The door to the launcher well is in the right foreground and the open door to the Seaslug quarters position annexe is in the starboard bulkhead.