D-9, probably why it was `mixed` up with Hamble,same airfield...?
I would't have thought that Her Majesties' Chipmunks could be loaned to a private organization, and vice versa - but I don't know either.
While I have Chipmunk histories I only have incomplete listings of which outfits "owned" which Chipmunks. This is very much a work in (slow) progress...
WD346 was with Southampton UAS from 1958 to 1966.
WP800 from 1956 to 1973, noted as coded "2".
WP629 from 1958 to 1966, coded "10".