This structure lies half buried
in the sand dunes to the north of the previous pillbox. All apertures
have been sealed except for a small ventilation grill, above the former
embrasure (or doorway), which appears to have been installed since the
structure was built.
[Map ref. ST 31254 58988]
The structure has been
extensively altered at some point, as you can see from the metal doors and
what looks to be a smoke or steam vent pipe, on the roof.