- Official designation: fw3/26
- Shape: square
- Central loop in each of three walls
- Doorway and loops in fourth wall
- Externally it is normally 10ft (3m) square
- Walls 18″ (45cm) thick
This is probably the simplest of all but not the most common pillbox type. Variations in the standard design have been identified in Dorset, Kent and Somerset.
The ‘Dover quad’ is a 13ft (4m) square pillbox with an overhanging roof slab.
The ‘defence post’ found in Somerset is a little over 8ft (2.4m) square with walls about 14″-15″ (35-38cm) thick and have wide slits extending the full width of three faces. Some have an open section on top reached by rungs and a ladder. There is a blast wall covering the entrance, integral and roofed to form a porch.
A prefabricated version known as a Stent was made from concrete panel and post sections, these can be found in the south of England especially on GHQ Line A in Hampshire and beside the Oxford Canal as well as the North East of England.
Information obtained from pillbox typology part 5 in ‘Loopholes’ journal of the PSG. With kind permission of Mike Osborne.