The message
from Dave Fawthrop contains these words:

I was once long ago, sort of, associated with an easy pay system run by the
then nationalised Electricity outfit. "Pay however much we tell you per
month and whatever you use we will only charge you that amount" I did
some sums on the bills, and found that they were paying a quarter in
**ADVANCE**. So you in effect lent them over 1/4 of the yearly bill at
zero interest.

Nobody ever said they were stupid!

--
Skipweasel
Pay no attention to the man behind the curtain.