This isn't a very upmarket part of Kensington by the way and there are plenty of parts of the borough that aren't.
It's not all castles and mansions.
I'm not claiming it is - I'm claiming that it is prime real estate and could be used much more efficiently to build more social housing in a less expensive area... this is simply a point about efficient use of resources. Someone else referred to the price of land being a reason for not developing when if anything it ought to be a real to develop and knock down unsafe buildings like this.