Currently in England MON to SAT at 11.30 PM last orders are called at the bar and no more drinks can be sold on SUN last orders is at 10.30PM. night clubs get a licence to open later.
What this causes is just before 11.30 on FRI and SAT loads of people order several drinks and throw them down ,then stagger on to the streets looking for a kebab ,curry,or fight.
It's a nightmare getting a taxi because every one wants one at the same time.
The idea of the new laws is to spread this chaos out but it is more likely that for the first year it will result in more crimes,violence,marriage split ups until we "get" the continental way of drinking.