Some notes about Longleat during the Second World War, posted on the Facebook page for Longleat (8th May 2020), include:
A large RAF storage depot, known as RAF Crabtree, was hidden in the forest. It was built in 1943 and 200 personnel were based there.
It mainly occupied the site now occupied by Center Parcs, but a few remaining buildings can be seen by the side of the road between the Center Parcs and Longleat entrances (the most prominent is a large blister hut).