For anyone with a T-Mobile contract:
T Mobile are introducing a £1 charge for itemised billing but this breaks the terms and conditions of their own contracts because it is above RPI. Anyone receiving notification of the increase will be given the option to accept the charge or change to unitemised billing. What they will NOT tell you is that you actually have the right to cancel your contract with immediate effect (but do it before the increase takes place) without penalty.
It means my dh for one now has a brand new, bang up to date mobile and can switch it to a pay-as-you-go which suits him much better. The price of a new sim card is peanuts compared to what he would have to pay to buy the phone in the first place.