I parked in a private car park at the station yesterday and got back to my car to find a parking ticket on it. I had not parked in a allocated bay. When I looked, I realised there was a white line on one side but not on the other but there were no yellow lines indicating you shouldn't park there. It was at the end of a row in a corner. The fine is £70 if I pay in 7 days or £100 if leave it. Reading the moneysupermarket website, many of these companies do not pursue you - it's not worth their while - and I do have grounds for challenging it, i.e. - it wasn't obvious that the space was not a bay.
Has anyone ever challenged or refused to pay one of these fines? £30 I could understand, but £100