Pillbox Square Type at Grid Ref. SK6183236667

This is a Second World War pillbox built in 1941, part of the airfield defenses for Tollerton Airfield. It is one of 18 surviving pillboxes located around the perimeter of the airfield.

The pillbox is constructed of brick with concrete lintels and features a flat concrete roof. Although described as 'square', it has chamfered corners, giving it an octagonal appearance. It is surrounded by a noticeable earthen bank that rises up to 0.75 meters high and is 0.5 meters wide. The long northeastern side has entrances at both ends, each protected by a pentice and an embrasure above. Other embrasures face south toward the airfield and one to the north, each designed with a stepped concrete surface that served as bullet stops. The walls of the pillbox are over 1 meter thick.

No internal inspection was conducted due to tree growth blocking access, but it was possible to view the interior through the embrasures. Inside, there is a central concrete anti-ricochet wall, and Turnbull mounts, originally intended for Lewis machine guns but later adapted for various gun types, are installed within each embrasure.