I was talking to a girl, on Thursday, who works for Eon and this thread came to mind.
She told me that they've had a lot of complaints about the monthly bills starting but, she says, the customers have been warned beforehand (on previous bills, in very small writing, on part of the page which your eye never focuses on!)
It applies to any customer who has a Smart meter, has a quarterly bill account, but is not on direct-debit.
Some people have just paid their quarterly bill and received another immediately, however, because they've not paid the second bill straight away they've got a 'late-payment charge'.
Why do the British public put up with this manipulative shit?