Don't really need to say anymore...
Sky Box sets + Unlimited fibre. Usually £76.99/month through Sky but Carphone Warehouse currently have it for only £23.35/month - a total saving of £966.52 over the 18 months.
Went into store today for something completely different and was shown this by one of the salesmen. Available nationwide (only in store). Not sure how long it will last for so make sure to get in there quick.
Could potentially combine it with this (sky.com/shop/offers/sports-and-movies) and you have the Complete bundle for £41.35/month for 6 months.