None that I know of mate.
The best one used to be Cloudcity, but Brian's toys bought it about 2 years ago. Since then their prices have moved in line with Brians. ie double what anything is going for elsewhere. You'll get great service from them it's just you pay for it, and they won't put a low value on customs forms (as is perfectly within thier rights) so you get stung again.
Other than that try planetforce/wormhole collectables or any of the shops associated with fee bay.
Leah's toys and Glactables (or however Robbie spells it) are both UK based, and both members on here.