Since there are fuel cost threads tonight, I'll tell you that my FIL was told by British Gas that his maintenance contract would be going up by 20%.
Being the sort of chap that complains about everything, he phoned them and told them it was disgusting etc. And they've reduced it by 10%.
So it's not a fixed increase, they seem to be trying it on. If anyone has one of these contracts and the price goes up - complain!