I admit that this is all I've read about this, but I'm slightly frustrated all the same.
This story that I found on the BBC news website today tells of a woman who is being "fined" by British Gas for using too little electricity. As someone who uses a pre-pay meter it seems that she is below the threshold that British Gas has set as minimum usage. Apparently Mrs Pracy made improvements under the Warm Front initiative and hence cut her usage down to below this threshold.
I admit I don't have the full story here but I still feel mightily frustrated for her!