It really is time for the restrictive Sunday trading hours to be lifted. The archaic laws have not kept up with modern society.
Sunday may traditionally have been a family day but there have been a lot of changes since then. People are in increasingly different family set ups. The working hours have changed for a lot of people and being able to shop on a Sunday morning would improve things greatly. It would help trade for businesses too.
Sunday is now a major shopping day and the hours need to reflect this.