"Gatwick is closing" rumours are cleverly started whilst BA is outsourcing a load of jobs and more than likely looking for cuts across remaining staff. Bit of a coincidence?
The fact is, that BA doesn't have, and won't ever have the slots at LHR to move its routes from LGW over. The BD slots are needed for new routes and increases frequencies on important routes. LGW serves its purpose as a primarily leisure based operation