Meant to post this a while ago. If you're a Vodafone at home (land line and broadband) customer then you will probably get a 1 year free Xbox live gold membership. I'm not 100% sure if this offer is still running but I got it about 3 months ago. I wasn't notified about it but just happened to find it.
Log into you online account and down the left side of the home page click on "Living at home". From memory there are then 2 options - 1 to buy and 1 free.
I'm just after checking my own account and I see they now have another free "add-on" called Mentor which is to help students with making choices in relation to subjects and study methods etc.
Hope this helps someone.