I dont understand why Virgin dont just sell their LHR slots to someone (other than BA), and move lock stock and barrel to become an anchor tenant at LGW.
They could have far more flexibility there, lower costs plus LGW is attracting more and more long haul traffic and Im sure would snap up the idea to turn LGW into a genuine hub airport to compete with LHR. If they really want to compete with BA then that should do the trick?!