Just had this price hike detals from Powergen.

I swapped to Equigas and Equipower a couple of months ago, no standing
charge, a fixed rate per unit with no "tiered" charge bands, and its a
non-profit organisation (they use Southern to handle all the billing
etc)

http://www.ebico.co.uk

They *are* listed on uswitch, but you need to make sure you tick
"include social tariffs" and "suppliers you can't swap to through us"