depends on what package you have. We have everything + sports so £37/month but you can have the basic package for £18 a month. It increases by £1 per 'mix' and there are 6 to chose from: music, kids, variety, knowledge, style & culture and news and events. so basically its £18 plus £1 for each of those that you choose:
https://i66.photobucket.com/albums/h264/aimyaimy/sky.jpg
The boxes alone should be £99 and then £30 for installation so an absolute bargain. They even throw in broadband (about 5mb) for free. It is a 12 month contract