There was also a home-built (IIRC), of a type unremembered by me, residing in J2 Hangar during the early 70s, owned by a Loadie (ex-48?), I believe.
It made its maiden flight, flown by someone other than its owner-builder, then shortly afterwards, left Lyneham for somewhere with greener grass - all a bit vague, I know, but somebody on Prune will fill in the gaps - won't they?