Won't work. There's a rare newt on a nearby lake.
You want the hot news? The next new London runway will be a 2000m runway (26/08, natch) at Redhill, with a fast surface link to LGW for interlining and a rail branch to the terminal.
It's a compromise between a 3rd runway at LHR and the Estuary Airport, neither of which is ever going to happen.
You saw it here first.