The trouble with that country is that everything is central to London which is almost a city-state unto itself. Until you break the cycle of centralizing indust

The trouble with that country is that everything is central to London which is almost a city-state unto itself. Until you break the cycle of centralizing industry in that location then you can't crash property prices. What you need is for central government to be moved out of London to reduce the dependency on this single region. As it is, London is susceptible to severe flooding as global warming continues to increase temperatures. That alone should move industry elsewhere.