On the subject of disabled parking badges and their abuse (Blue badge abuse law passed", The Herald, August 20, and Letters, August 21), would it not be a better idea for the photograph of the owner to be required to be shown on the visible side, so that any warden on monitor could see, when the driver returned to the car, if he or she was the true owner of the badge?

A D Williams,

20 Pennycook Court, Dundee.