Our Political Correspondent attended the briefing in which the Mayor revealed he also wants to get his hands on government owned property in the capital.
Boris Johnson is demanding ministers hand over the annual £1.3bn income from stamp duty on London property sales. @itvlondon
The mayor claims giving City Hall the money is the key to unlocking London's housing crisis. @itvlondon
Johnson believes the move will lead to an increase in new homes from 33,000 to 40,000 a year. @itvlondon