I'd be interested in banning overseas buyers who have the sole intention of renting the properties out or at least a vastly inflated stamp duty on those types of buyers who predominantly don't pay taxes on the income of those rentals. Properties are being bought up in blocks of 10, 20, 30 properties at a time and just handed over to letting agents to manage.

It'll also be interesting to keep an eye on the new Skipton 100% mortgage deal for people who can show they've got a good credit rating in the rental sector. 5.49% interest rate IIRC which isn't that bad in this market.