dcsprior
Member
Places do have shorter opening hours on Sunday and it's not just because of demand. Larger shops are limited to 8 hours of opening on Sunday by law.
This is not the case everywhere in the UK. Larger shops in England and Wales are limited to 6 hours of trading (with many having 30 minutes "browse time" at the start of the day, so the doors are open for 6.5 hours total)
In Scotland their is no such restriction, and indeed there are shops here open 24x7
I don't know about NI