Castlehaw Royal Observer Corps Post
Description

Castlehaw Royal Observer Corps Post from the air MYD36549 (c) YDNPA, 2023
This ROC post was opened in 1938 and was part of No 29 Group based at Lancaster. In 1943 it was equipped as a ‘Granite’ post, this was the code name for posts built on higher ground and supplied with flares to warn friendly aircraft of nearby hills. In 1965 an underground bunker was built here as part of a low level early warning system in the event of a nuclear attack. It was closed in 1968.
Source:
Wood, Derek (1992) Attack Warning Red: Royal Observer Corps and Defence of Britain 1925 to 1992. Portsmouth: Carmichael & Sweet