Massive local opposition to any use of Wisley when Vickers let it go - even we modellers got sickened off. Great shame, as you say, good GA potential but its position between London Airport and Gatwick would have made full use of the runway problematic. It hosts the Ockham VOR (ident 'OCK'), which is used as one of the four stacks for London Airport.
I think it was used for some of the filming of the models used in 'Battle of Britain', but memory fades...
TOO