Housing and Planning Bill

In a free market, how do you calculate the 20% discount within the first five years? Take year three. Who would decide the market price, and the subsidised—discounted—price? Would it be the estate agent; would there be some sort of independent valuer; or would it be the department? Who is going to do it? At that point, we would be interfering and trying to prejudge market values. I do not think that it will be possible.