Can anyone help me?  I am trying to find out why, when putting petrol into my car, I am unable to put in a round figure of, say £40 – it is always £40.01.  The same thing happens if I try £30 or £50 – is it possible to stop the pump at an even number or are they programmed to go over by 1p for a possibly sinister reason – keeping 1p coins in general circulation when they are pretty useless otherwise???  Answers on a postcard please!!!