The Mayor’s plan to release green belt land for development is a good start, but if we really want to fix London’s housing crisis we need to build more and higher in the centre, says Joe Hill

London’s success isn’t inevitable. It’s based on people wanting to live and work here, and there being enough space to house them. The Mayor is right to announce that he will release some green belt land for housing – but he wouldn’t have to if we could just build more densely in the centre of the city.

Great cities like London succeed because of powerful agglomeration effects – the secret recipe for prosperity. The more people can move to the places where the best jobs and best infrastructure are, the more companies and government can invest in that area – perpetuating the virtuous cycle. Denser populations generate innovation – people are more likely to invent new........

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