I parked in an on road pay and display area (ie local council control), bought my ticket and stuck it in the window - even checked it as I walked away from my car. When I came back the ticket had fallen off and I had got a parking ticket. Emailed the council and explained but they have just written to say as I did not have a visible ticket it is my own fault and pay up. I am gutted, £25 to park for an hour when I had a valid ticket. Is it worth contesting further?