Question for those most familiar with land use around Heathrow.
If R3 were built and getting close to capacity, is there room for a fourth runway ?
An article in PropertyWeek from 2008 suggests either the demolition of large chunks of Bedfont / Stanwell or siting it next to the M4. Presumably R3 would become a full length runway before R4 were proposed.
I'm struggling to see how both R3 *and*R4 would fit between the current north runway and the M4 while ensuring appropriate separation between runways, but could well be wrong on this.
Can someone knowledgeable comment on this ?