I think the current livery is the best, followed by the Landor livery.

The ethnic tail fins were an innovative idea but we know they didn't go down too well, even though Maggie should have been supportive of a private company doing what they wanted with their brand, it didn't look right and there's few better sights at an airport of seeing all the union flag tailfins lined up at T5, something we'd have never seen if they'd persisted with the ethnic tail fins idea.