If your still in Wilts then I cant reccomend the Bourton on the water museum highly enough. Atwell is good bit there asn't enough atmosphere. Really wide selection and a nice AEC on the way in too!
Been to the Calne Museum a couple of times, all sorts of cars tucked away in separate garages and hangers. A lot of their display is classic wedding cars. Each car has its own history. The Minor is new, the only one there was a tatty Highway Yellow car
Well worth a visit.
when I was up there last time, I asked if they would be interested in loan cars (I dont have the space for all my projects ) but they said they are/were at capasity.
The Morris is a raffle prize which the museum are currently selling tickets for. It was on displayon their stand at the Bristol Classic Car show recently. Looks very presentable. I've already bought my tickets!