Toys R Us are offering 10% off the Xbox One and PS4 due to a coupon loophole, according to Savvy Gamer.
The deal means that you could pick up an Xbox One for £383 and a PS4 for £310. To qualify you have to buy one product that gives you the voucher, currently the lowest priced product is a plastic Xia Xia shell worth £1. You have to buy the product by July 31st and use your voucher during August
Toys R Us are already offering the consoles at £10 lower than the official RRP though it looks unlikely that they will honour the voucher once they realise the loophole exists.