What, like a caravan? I like it!
If there is a massive housing shortage in Lewisham which is almost certainly true, and local groups are looking after their own interests which they most probably are, then if say Hornimans was turned into a caravan site, that certainly would focus attention on the issue.

Either areas allow measures to be taken to increase the population density and take their fair share or they may find a string of caravans parked in their road. As a slogan, it needs some work, but morally if people are living in cardboard boxes and families sharing living space with alcoholics and psychotics then there is no debate.