STH
Yes most still had the lead lined storage holders in them, even when they had been put to other uses, and including the disused ones at Barnham. On active units because of the security combination lock on the doors the buildings were often still being used. At Wittering on the ASU site we were using the ones there until we left in 2002 for ammunition. However one complete example was dug up and removed by AWE to go to their museum at Aldermaston.
Other than single ones in the floor of the tree roofed buildings the only other examples of these floor depositories I came across was in the disused site at Scampton where a single larger building had some 6 or 8 in it if I recall.