Recently, on a trip to Nottingham with my friend and colleague, Phil, we swung by Warhammer World, the part of GW's corporate headquarters that is open to the public. I've got to say it, I had a great time. There is a huge shop, a huge games room, a nice pub, and an exhibition hall. I was sceptical that a miniature exhibition could really be worth the £7.50 admission charge, but it was fantastic! (If rather lacking in LOTR models!)
Phil did a full write-up of the exhibition on his blog, complete with some photos of some of the cooler displays. You can see it here.
Really, if you are a sci-fi/fantasy miniatures fan, and you get the chance - go.