Housing alone is not enough!  We must protect space for infrastructure and land designated for employment.  Here's a really useful brief on the Thames wharves from Roy Tindle and Roger Manser of the Just Space economy group:

Roy writes: John Gummer prepared the legislative base for safeguarding Thames wharfs: this provided that the listed wharfs could not be released for development without Secretary of State approval. The Chancellor, earlier this year, devolved that responsibility to the Mayor of London - yet another of his witless acts. The PLA also seem to have lost the plot, "infrastructure" doesn't effectively cover the significance of working wharfs. Some 3M tonnes of sea dredged aggregates are landed at safeguarded wharfs, every year, and this is supplemented by land excavated aggregates from Colchester, also delivered via the Thames. The principle wharfs, Angerstein and Murphys, in Charlton, have a rail head by which approximately half of the landed aggregates are shipped out. All in all, about 375,000 less lorry journeys per year.

Roger wrote: Today's FT (28/09/2015) has an article on the Thames traffic - supposedly set to treble by 2019 (the new sewer, fewer trucks etc)... and the need to keep working commercial wharfs... the Port of London Authority is arguing against housing developers... "We have to remember you cannot have the housing without the infrastructure," says Robin Mortimer, chief executive of the Port of London Authority.