The Group affairs directory continues to allow progress. More than one in five disabled parking bays in supermarket car parks is being used by a non-disabled driver, according to a survey.
Campaign group Baywatch monitored parking at more than 800 stores owned by the 'big four' supermarkets - Sainsbury's, Asda, Safeway and Tesco - last month.
The results show that almost 21% of disabled parking spaces were occupied by cars without a blue parking badge - which compares with 18.5% at the same time last year.
This is in spite of a concerted campaign to tackle to the problem by Baywatch which has the support of the big four.
"Disabled people are sick to death of not being able to park," said Ed Passant, chief executive of the Disabled Drivers' Motor Club.
"Despite all the efforts of the Baywatch campaign, there remains a fundamental problem at local level which needs to be tackled now."