New central London sites have been dead in the water for 30 years. Recent events including Vauxhall, the safety review, Heathrow runway 3, Grenfell, pollution and even austerity are the many nails in the coffin
Where I think the industry dropped the ball is in not looking at sites further out when Crossrail was planned and indeed now with Crossrail 2. We could have had say 4 sites North, South, East and West adjacent to stations with journey times into Central London of 15 minutes. Now Crossrail is effectively built, the developers have already built housing to capitalise on these sites.