I'm with SP on dual fuel online saver 4 paying by monthly DD, I was £66 in credit and have never ever owed them money, they sent me a email telling me my DD was to increase from £73.50 to £83.30, they soon restored it back to the original amount when I gave them Two choices.

Either leave it alone, or I leave you alone and change supplier. !

In Sept. this year I switched to Scottish Power for Gas & Electricity paying by DD. Two months later they increased my DD by 15% due to my increased usage. You know what, I didn't know my usage would increase in winter !!!!!!!!!!! The hole idea of a payment plan and DD is that it evens out over 12 months as I use less in summer (strangely enough). When I questioned SP they said the system automatically adjust's everyone's DD to accomodate the change in season. When I asked if the system would reduce it in April the response was I could request a review. Strange how a system can seasonally adjust up but not down. Anyway I will be phoning them with a meter reading (even though I gave them one three months ago when I joined) and get it reduced back down. So anyone else using Scottish Power get a meter reading and let your money sit in your own bank account not there's.

Regards

M

P.S. They also said when the system adjusted my DD up, I was £35 in credit!!!!!!!!!