When you consider that owners, including myself, report that hundreds of people apply for rentals when they are advertised, a few hundred properties does not make a significant difference. All those Airbnb properties will not return to the rental market. From reports about numbers who applied for PP, it would seem Hosts are ignoring the regs. Collecting the info about short lets is easy, just open Airbnb/Booking.com etc, but having the info is not enough to prosecute. The LA have to prove money was paid, catch the guest in the property and confirm they were guests who paid for a short let. A tall order to do in any meaningful number of cases, LA staff literally have to watch the property to catch the guest.
I’ll look for the article.
There is a pretty simple solution to gather actual proof of doing dummy rentals. Considering it is very obvious when places are in breach and success rate would be extremely high to cover costs of having people rent the places undercover. for the purposes of gathering evidence for prosecutions. I am sure a private company would be willing to undertake the task considering it would currently be an extremely lucrative contract. (Edit - Obviously right now, not so much )