Something I wasn't aware of:

''Please be advised that as also stated in your terms and conditions if we announce that our prices are increasing you are entitled to a right to cancel.

A right to cancel is a process enforced by Ofgem where you have the full right to cancel your agreement with ourselves and change supplier without incurring the price increase or receiving any cancellation fees. When notification is provided to you (at least 30 days prior to the increase) it also offers you the option of a right to cancel, which you then have up to the date of the increase to advise us of this decision. ''