Rubbish. This would necessitate a complete rework of the queuing model used at LHR. Fuel endurance will always trump convenience. Given so many flights into LHR are long legs, it seems unlikely anyone would be able to trump those flights. Domestic and other short haul will be held on the ground. That's the new reality. Even those high value JFK-LHR flights get slotted to arrive within a very tight time window.