I own a 3 bed property that I have been renting to a friend for the last 10 years. He is moving to Australia soon, so I will be looking for new tenants. I have only been charging him 1150 a month in an area where the average rent for a 3 bed is now 2200. I don't want to raise the rent to that level, but with the recent interest rate changes I will need to charge approx 1600 to cover costs. Is it possible to raise by that much in an RPZ if I can prove that the rent is way lower than it should be?