The developers of the Chelsea Barracks site have been told they must start delivering the homes they promised, or to sell up and release the land.
The project has been put on hold, apparently because of the current economic climate. But Westminster Council is urging the Qatari developers to start building their vision.
Cllr Jonathan Glanz from Westminster Council.
More top news
Man who has barricaded himself in house for three days may have a stash of petrol and other explosives, police say.
Transport secretary Chris Grayling said MPs will decide this week about where to allow airport expansion in south east England
The Met Police has thanked residents in Northolt for their patience but has warned the armed stand-off could take time to resolve.