Driver and Vehicle Licensing Agency abolished paper tax disc a few years ago . Car tax now automatically cancelled whenever vehicle changes ownership . Official figures show use of clamping soared from about 5,000 vehicles a month before the changes to well over 8,000 now . Critics say many targeted are innocent drivers unaware of rule change .
Driver and Vehicle Licensing Agency abolished paper tax disc last autumn . Car tax now automatically cancelled whenever vehicle changes ownership . Official figures show use of clamping soared from about 5,000 vehicles a month before the changes to well over 8,000 now . Critics say many targeted are innocent drivers unaware of rule change .