When I was in Galashiels last year I was shocked to learn that the Tesco there was open 24/7. I had no idea that Scotland had different Laws concerning Sunday working times!
The whole practice is archaic and out-of-place. Yes, it relates to Christianity. Fine. But why should the minority - I would be very surprised if it was no a minority, and quite a significant one at that - who actually observe general Sunday rest days with regards to their religion or whatever cause the rest of us to lose out? Indeed, if football can take place at any given time (more or less anyway) on a Sunday, then why should one of the other principal social activities - i.e. shopping - be limited? Nowadays many larger stores have more localised units anyway (Tesco Express, Sainsbury's Local, etc), which get around this restriction, so why not just relax the Law and allow service to continue as normal, and as is true north of the border?
As an extra, what is stopping people from casually overstepping the border in order to access a Scottish superstore when English ones should be closed? I think I can safely say that, unless there is a phycisal or legal restriction in place, if I lived in Carlisle I would not exactly be against the idea of heading north to do my weekly shop if it meant I could do it on a Sunday.