I know itās a very long time ago that I studied maths but ā¦
Itās Boris Mathsā¢ - if you believe hard enough 12 = 15 
Edit - actually the EU average is 12 and the UK currently has 8, hence the ā4 moreā.
Canāt say Iād say no to a few more days off but itās an unashamedly, transparently, populist policy suggestion (bit like telling the BBC it has to go back to free TV licences for over 75ās)
but - will they follow the EU convention if a bank holiday is on a weekend, a āsubstituteā weekday becomes a bank holiday, normally the following Monday.
This doesnāt happen in the EU AFAIK.
I think people would be far happier increasing the statutory minimum holiday allowance by 4 days per year (currently 28 in UK for full time employee). There may be an extra cost to employers of approx 2%.
Bank Holidays were always a nightmare at work as it meant that we had to get 5 days work done in 4 days.
Our employees were always happier once they could use the 28 days or whatever as they wished. Most of them liked to work on a bank holiday and take time off somewhen elseā¦