I want to buy a new, good laptop. It will be used for playing games, recording, rendering, editing and watching videos. It want it to be really good, at a price around £600-£800. I would prefer a UK make to prevent the hassle of postage and packaging.
Any suggestions will be greatly appreciated.

When it comes to graphics, I believe Mac computers stand as the best, but definitely not when it comes to games. A compromised computer, in my opinion, is HP. You should check the Pavilion series, it works great.