Just read a little article in Planning Magazine the key bit of which is a recent report by the RTPI which states that ten of the UK's top housebuilders hold planning permissions for nearly 225,000 homes. Put bluntly, they're not building as much stuff as they should; instead they're land banking it. This got me thinking, if you could look back at all the residential new build planning applications made in London in say 2004, and track their progress to the present day, how many would have been built and how many would still be stuck in the pipeline?

