Yeah, they're not gonna enforce it. It's just a marketing announcement to let Mr Brexit Pubs deny all responsibility when one of their patrons uses pervert glasses to perv. "Well, we told pervert glasses wearers not to perve, so it's not our fault".

This would be amazing if they enforce it. But most clubs and bars turn a blind eye to assault and harassment unfortunately

And they intend to enforce this, how?

Well, they've just banned "spywear" wholesale from UK Court premises which will make it easier for pubs and the like to do the same.