Another british-based illustrator whose work I have recently discovered is Steve Cox. He's coming a little more from the children's book illustration arena, which I seem to be moving more into these days, so I was admiring his work from that perspective, but then I found he's done quite a bit in the fantasy arena too, which I thought was well worth sharing here.
Official Website:
Steve Cox Illustration
Blog:
Steve Cox Blog
Also check out this crazy Pop-up book project he did -- so much fun. I'd love to work on something like this!:
Pop-Up Spooky Castle