Meanwhile many fewer homes are being built. The largest drop has been in building by local authorities, which used to account for almost half of all new builds before Thatcher brought things to a halt in in the 1980's by selling off social housing and preventing councils from investing the proceeds. (See: http://www.lrb.co.uk/v36/n01/james-meek/where-will-we-live)
As real wages have stagnated for most people, multiple administrations have propped up demand through ever inflating house prices. People feel richer when their home goes up in value but this wealth is illusory, nothing new has been created, only a generational shift in capital as young people are forced to fork out ever more of their income in rent.
The private rental market in the UK is all short term lets, after the first year the landlord is free to adjust the rent. With council housing now largely gone it's an unanchored free market. Restricting supply (e.g. through difficulty obtaining planning permission) while demand increases does of course drive up rents.
Property prices are a function of interest rates and rents. Credit conditions come into play here in determining how much a prospective home owner or buy-to-let investor can borrow and pay for a property.
I agree loose credit is the primary cause. However that wasn't what my post was about, I was challenging the assertion that planning permission is easily gained. It's not.
Restrictive planning is vital for creating artificial scarcity. To ramp prices with loose credit you have to push supply below demand to create an auction scenario.