Originally Posted by
Marcusm
Although an island, it's effectively a provincial town with fewer than 100,000 inhabitants (albeit above average wealth). I doubt BA is losing much interconnecting traffic although the passengers might not have the easiest of routings.
Provincial Town - yes

Global Finance Centre - yes
But the fact that BA deems it appropriate to run 5 [and imminently 6] a day, all year round, suggests there's perhaps a bit of commerce going on. Certainly there are plenty of suits and briefcases when I fly the route, and that's on a mid-day flight.
I have no idea what the pax do after reaching LGW, of course. Whether it's in the City, or heading off to more distant locations, is an unknown. I guess BA have an idea of who goes where, and have sensibly determined it isn't worth running an LHR slot.