On the south side of the perimeter road at RAF St. Mawgan beside an area of hard standing
OPEN All surface features remain intact and in good condition with some green paint remaining. The hatch is retained by its original bar and padlock but the padlock is broken. The post has in the past been used by the RAF for NBC training but is no longer used. Internally the walls are partly covered with soot. The table and shelf remain but are broken, the cupboard has its doors detached. Also remaining are two lights, GPO junction box and wiring. The post is designated building 434 on the base.
Opened in 1961 and closed in 1968.