Zavvi (and The Hut) are currently offering 14 months of Xbox Live Gold Membership for £33.93. From what I can gather this is one of the cheapest deals now that everyone seems to have upped their prices, even the websites that email the code to you. I ordered my card last night and, although it says that it's only available for Pre-Order and will be delivered on 24th September, my card has already been despatched.
I've managed to get some very good deals with HotUKDeals, so I'm hoping that this can help someone.
2% Quidco also available.