Xbox Live 13 Month Subscription, £29.99

Xbox Live 13 Month Subscription - £29.99 emailed

This is from PlayTrade, which isn't run by Play itself but rather by its users. I think you can trust this given the testimonials, but bear in mind that you have very limited recourse should your code not arrive/work. Instead of a shipped product they'll just send you the code to redeem on your box.

If you feel uncomfortable about this then the next best deal is £34.86 delivered.