My DB is an accidental landlord, due to having needed to live in accommodation on the site of his job. So far, it has worked well, but he is definitely mindful that he may need to just get rid of it soon. The property has never, ever, been in any kind of disrepair and any issues flagged by the agent have been dealt with right away. It's a really lovely little place and the tenants have enjoyed living there - usually between house moves or after divorces etc. So the rental housing stock is definitely needed in that area and he is a very good landlord - everything by the book, professional agent, no delay in fixing, mutual cooperation.
I think there are a lot of people who are accidental landlords. People who get together when they both own a property - end up living in one and renting out the other. People who go abroad for a year or two or whatever for work.
In the paper today, there is a Labour MP who rents out several properties. Along with photos of nasty black mould in them. It's aggravating that people like him are part of the problem (he's issued an apology, so that's all fine then
) whereas people like my DB who don't create problems and only rent out a single property, paying tax on the income, are going to potentially end up in situations where it no longer makes sense to rent the property out.
Like most of the idiotic policies, there are going to be unintended consequences. The stock of rental properties is already very low in places where it's desperately needed and the consequences of this policy could be to deplete it further.