The final phase of the Ynyslas projectile fuel research establishment (1946 onwards) appears to centre on five buildings to the north of the service road - NPRNs 408396, 408398-9, and possibly the house (now a private residence ) at SN60819304. The largest building, measuring 30 x 10m and orientated north/south, has been removed but its outline and that of the enclosure that surrounded it are still visible on modern aerial photography.

Maritime Officer, RCAHMW, March 2010.