I know nothing about UK sites. Sorry.
But... look on ebay. Qnix , yamakasi and others are shipped directly from Korea.
I recently bought a Yamakasi Sparta 301 2560 x 1600. Shipping was very fast, no dead pixels.
The stand was flimsy, but I use a vesa wall mount anyway.
At the price, I figured I could buy a replacement cheaply enough if there should ever be a service requirement.