HOUSING developers in London will be allowed to reduce the number of so-called affordable homes they build under government plans to boost housebuilding in the capital, it was revealed today.Housing Secretary Steve Reed and London Mayor Sadiq Khan are expected to announce the package within weeks, in what officials describe as a “time-limited intervention” to reverse the sharp fall in construction.The plans have been welcomed by developers but condemned by homelessness charities, who warn they will worsen record levels of homelessness.