Housing associations in London may enter “strategic partnerships” with City Hall, as Sadiq Khan’s overhaul of affordable housing funding was hailed as a “defining moment in housing history”.

The mayor of London published his first affordable housing prospectus yesterday, offering fixed grant rates of £60,000 for low-cost rent and £28,000 for rent-to-buy and shared ownership.

Mr Khan will only offer these top grant rates to providers willing to build 50% affordable across their entire portfolio and will enter into “strategic relationships” with certain major providers able to build at least 60% affordable.