15.6" Gaming Laptop - Less than £1000?

Consider Lenovo Y50 15.6" gaming laptop http://www.amazon.com/Lenovo-15-6-Inch-G... It's got NVIDIA GTX-860M 2GB graphics card, which will play almost any game at high to ultra settings. Open graphic card specs at http://www.notebookcheck.net/NVIDIA-GeFo... and scroll down to "Game Benchmarks" You can see that games like "Watch Dogs", "Titan Fall", "Saints Row IV", "GRID 2", "The Elder Scrolls V: Skyrim" are all playable at ultra settings.

Take a look at the Lenovo Y40 or Y50. If you can find one on closeout somewhere, the Lenovo Y510p would be a great choice as well, especially with the dual graphics adapters.