Just had a look at the pics on 615s website- and there's 'my' barge! I soloed in WB922, The Royal Barge(cos Prince Andy also went solo in it
)
621, now based at Hullavington, operate 922 as part of an historic flight. They've got an old barrage balloon winch as well...
http://www.621vgs.co.uk/ and check out 'vintage flight'