Ok so having been waiting fir weeks to get a new energy bill so I can see what I would be paying and make a decision re who to move too I finally received it.
Previously with green paying 74 pound a month and I had built up 300 pound credit.
So
Imagine my surprise to just receive a 260 pound bill. From shell BTW
Wtaf 
Small two bed mid terrace how the hell did I use 260 quid.
Who did u all move too