Thank you Mark for the work you’ve done and saved me!
I spent one long morning phoning isupplyenergy and filling in their forms to be told at the end that my meter MPAN number wouldn’t be accepted by their computer system, but try again in a year. They could have told me this after the very first question when they got my MPAN from my address!
However, Cooperativeenergy, your second cheapest came up trumps within the hour, and all being well I am transferring to them and saving around £350.
Thanks once again!