Totally OT but.
Some years ago with a company I used to look out for (accounts etc) I had an ongoing problem with British Gas, every-time I submitted the reading over the phone because I do not pay estimated bills they then amended the bill, this went on for several years, then on one occasion the person on the other end of the phone said it can't be right as I had give a reading for a 5 digit meter and it should only be a 4 digit reading.
They even insisted they were correct because of "actual meter readings" taken by meter readers on previous occasions, "this I knew was a lie because there were only 2 people with access to where the meters were and neither of us had ever been asked by a meter reader for access to read the meters.
So I insisted on a inspector coming out, yep, you guessed it, we had a 5 digit meter and they did not know what the heck they thought they had.
What had actually happened was the meter was replace 3 years earlier and the contractors had failed to give BG the new meter information.
The discrepancy which also had to be repaid was £3,000 "which I always knew about" so that was no big surprise.