Now the first suggestion is: never buy a camera just for uploading to a.net. buy it for yourself, for your hobby, perhaps for a job. but never exclusively for uploading here. Second, if you can, go to a store and see which camera feels the best in your hands. You'll hear all sorts of suggestions for Nikon, Canon, Pentax, even Olympus and Sony perhaps. They'll all produce quality images, but always go with what feels best to you.
Now, after that, I personally suggest the Pentax k-x, probably because it's the only dSLR I have experience with. Checking online for the States, there's a package that comes with camera, 18-55 kit, and a 50-200 as well for right around 600 USD (~375 GBP). Now whether that price dictates the equal value across the pond, I dunno.
Good luck and happy searching. Getting the first dSLR is very fun!