This is a new rumour, and is based on insider talk....sounds entirely plausible that BA will focus on LHR. (Shrinking Ship!)
Well there's no room at Heathrow so I assume you mean BA are downsizing by seven B777s and over thirty 737 / A319s? Given that LGW long haul is allegedly the only part of the airline still in the black and also that's a whole lot of redundancy payments. BA's major problem is bloated costs and outdated working agreements and most of them are at Heathrow. Gatwick is a much leaner ship.