Gordon, if they are the ones breaking or changing the contract they cannot charge you a cancellation fee. Go and have words with CAB and or consumer action group and then tell them as its them that are attempting teh changes then you are entitled to cancel with no charge
I had similar with Vodafone who wanted to cap the data allowance on my mobile package and start charging me extra if I went over it. Ofcom deems that an unfair change in contract and Voda had to cancel mine ( and many others) contracts if we requested them to do so. I ended up getting a very top end phone free after only 6 months of a 24 month contract...
