I have overpaid for my supply by circa£1000 through the direct debit payment scheme. Rectification from British Gas was reduced monthly direct debits for the next twelve months. I requested my direct debits remain unchanged and for the surplus to be refunded. Apparently British Gas do not have the ability to repay in less than 8 working days and failure to do so will result in compensation of a maximum £8/day. Moral of the story, read your meter monthly. Adjust your DD quarterly and ensure your account never exceeds one month average consumption in credit. If we all do this it will make BG trade on energy, not customers funds