Can I then ask is it the caes that BA must fly their southern US routes from Gatwick? Dallas, Houston and Atlanta I am sure would be better off at Heathrow with an improve business yield.
I think the LGW - ATL was a route they inherited from British Caledonian when they took them over, so I think that more a historic remnant than anything else. I'm not sure about the other two, and whether it was the same situation with them.