Should Sunday trading be extended?

During the Olympic period large stores in England and Wales have been able to open for an extra two hours on a Sunday - meaning shops can stay open for 8 hours in total rather than the usual 6.

The BBC's Steph McGovern asks The Trafford Centre's Gordon McKinnon and Nigel Dowdney from the Association of Convenience Stores if big shops should be allowed to open when they want.