There is some rigidity in the UK. The "green belt"[0] is meant to constrain urban sprawl. Admittedly these constraints aren't set in stone and can be changed.

There is some rigidity in the UK. The "green belt"[0] is meant to constrain urban sprawl. Admittedly these constraints aren't set in stone and can be changed. [0]: https://en.wikipedia.org/wiki/Green_belt_(United_Kingdom) https://en.wikipedia.org/wiki/Green_belt_(United_Kingdom)