It's not that long ago that the last County in Wales voted to open pubs on Sundays.
Prior to that we had the ludicrous position where people would cross County boundaries on a Sunday just to be able to get a drink.
Drinking was permitted to travellers, and some train routes only made money on their Sunday timetable because they ran a buffet car with drinks.
Anyone who has visited Wales is likely to have noticed the great number of 'Clubs' we have; political clubs, working mens clubs, sports clubs etc. These, being for 'members' only were outside the scope of the Sunday drinking laws.

As it says in at least one version of 'Cosher Bailey'
Have you ever been to Wales
Where they brew the finest ales.
If you want a drink on Sunday
You will have to wait 'til Monday


Nigel