Small shop owners have been drumming up support for their campaign opposing the relaxation of Sunday trading laws ahead of next week’s debate on the Sunday Trading Olympics Bill in the House of Lords.

Chancellor George Osborne announced in last month’s Budget that Sunday trading laws, which restrict the opening hours of larger stores, would be relaxed for eight weeks over the Olympics.

The move provoked fury among independents, who joined forces to launch a postcard campaign against it. This week, it was revealed that Stockport-based Parfetts Cash & Carry had collected 651 postcards, which had been sent to 95 different MPs.

“The amount of support we know is happening from c-store owners up and down the country is fantastic,” said ACS public affairs director Shane Brennan. “MPs will be in no doubt about how damaging the change will be.”