@scaramanga Market Forces...everyone moves to Wigan to buy cheap houses...houses no longer cheap.
ok, I'll edit it...
You can live in a brick part of Wigan, or a brick part of Harlow. The bricktyness factor is about the same bar one thing - one of these areas is in a region of greater wealth, and therefore better employment opportunities. Therefore, there's more demand to live in the equally brick area, which pushes up the cost of housing there.
If the cost of housing in an area like Wigan is so much cheaper, I would suggest that it's not to do with the unwillingness to live in a brick area (see a brick part of Harlow). But it is due to the economy of the area not being able to support enough workers that create a high demand for the housing there.
So there is a lack of cheap housing in the UK, because people need to be where the work is. It's disingenuous to simply say "move to Wigan."