There is often land available; it's just that the well-heeled in the stockbroker belt next to the green belt, don't want new houses on their doorstep.
They prefer nice views of pretty meadows, and expect the huddled masses to stay in the cities.
I wasn't referring to land in the rest of the UK - there's plenty of it but it's not all is developable.
I was referring to the fact that BAS thinks that people have some kind of rights to live in areas that they can no longer afford to live in just because they might have family or friends living there.
Possibly the reason that areas become expensive, and hence unaffordable for young people wanting to get on the ladder, is to do with the planning system.
Because the system effectively rations land, it pushes up the cost of housing. The Geern Belt was established after WW2 to prevent urban sprawl, but it has somehow become sacrosanct, and acted as a block on development. Naturally, people living on the edge of the Belt want it kept that way, regardless of how many people can't afford homes.