Scope is to appeal to the Disability Rights Commission to bring civil court proceedings against supermarkets that flout campaigners' attempts to stop abuse of disabled parking bays.
The charity has admitted that its 'Baywatch' campaign, a collaboration with the British Polio Fellowship and the Disabled Drivers' Association, isn't working.
This year's annual survey - the fifth - has shown no real improvement, with supermarkets largely unwilling to tackle misuse of disabled parking bays by their able-bodied customers. Bays are occupied by cars not displaying a valid blue badge for about 20 per cent of the time.
Because of a lack of interest from the Government, campaigners are seeking to secure a meeting with the commission by the end of March.
They will urge it to take a test case because they believe that supermarkets could be liable under the Disability Discrimination Act.
Baywatch spokesman Douglas Campbell said it was time to stop being nice.
"Some individual supermarkets have solved it, but we must get supermarket board directors on-side to ensure this abuse is no longer accepted," he said.