PS4 Console | GameStop | £329.97 (pre-order)
While £20 cheaper than the deal I posted yesterday, GameStop don't actually have the PS4 in stock right now. But if you don't mind waiting (for what I can't see being more than a week or two) then this is the best price you'll get before an official reduction. GameStop are a big company, you're not going to be waiting too long for their stock to arrive.
Thanks to SteTheDone at HotUkDeals.