SS7898 : Bombing Decoy Bunker above Tonna - Generator Room
taken 10 years ago, near to Tonna, Neath Port Talbot/Castell-Nedd Port Talbot, Wales
This bunker was part of a relatively secret programme of decoy sites designed to fool World War II German bombers into targeting unpopulated countryside instead of towns, factories and airfields. The bunker has two rooms, one of which would have housed a generator and the other of which was to observe (through a hatch in the roof) and control an area of lights and fires laid out to emulate a town or airfield when viewed at altitude in the dark.
This site was missed in the original Defence of Britain survey but has been included in the Pillbox Study Group's "Extended Defence of Britain" database with ID e18821.
Bunkers in this programme are sometimes known as QL, Starfish, SF or Special Fire.
For general info on these see:
Link
Archive Link
For another site in this group see SN7200 : Bombing Decoy Control Bunker on Mynydd Drumau