Meanwhile, I can't help but feel if there is a point here, it's being missed by a country mile.
From personal experience, I don't really care about the noise inside a venue. It's the noise outside - people leaving late and making a (not unreasonably) amount of noise as they chatter and socialise getting home via the taxis and cars that will be picking them up. Seems to me these measures intend to ignore that.
Also it's rare that state intervention can reverse entropy. The high street as we knew it is dead. And it's never coming back.
There was a post in my local Fb group with a link to an ad for a shop in the local High Street (suburban Brum). 1890 sq. ft : £52,500 pa Call it £1,000 a week.
That's before:
Business Rates.
Utilities
Insurance
Which will easily combine to be an extra £1,000 a week.
So that's £2,000 a week (c. £300 a day) that you need to make before you even open the door.
And note- not a single mention yet of staff, wages etc.
This isn't rocket science. This is simple back of a fag packet in-my-head sums. What business venture can deliver £104,000 a year before profit ?
https://www.bbc.co.uk/news/articles/cwye5jx8y3go