I found zooplus do, but now dont know what to buy!
ETA: http://www.animalmagicpetsupplies.co.uk/
They take paypal and everything you buy will be supporting rescues
Zooplus is excellent for postage. Its free on orders £19 or more and £2.90 for orders under £19. I bought the buns some things from there, ordered late Friday, arrived today.