Investing in London's affordable housing

An interesting report from LSE London argues that the government should invest more heavily in affordable housing in London. [Disclosure: I am affiliated with LSE London]. It justifies this conclusion on the basis of need (crowding and rent-to-income ratios are higher than in other parts of the country), value for money (costs are higher, but land used more intensively and private sector leverage higher) and housing numbers (the government will not reach its affordable housing number target otherwise)