Geoff..I know where you can get this plant. While mine is a division from an old plant I know who cloned it and they offer small blooming sized plants. They might ship to the U.K. I can pm you the phone number. If you want to try it?
I've seen some great vandas advertised in the UK that are hard to find over in the U.S. I know of a couple of nurseries that ship out of Singapore. I just don't know how tough it is bring plants into the U.K. I have a couple that came by way of Germany. There is a pretty good nursery that carries quite a few hybrids and species.