UPDATE 12:24UTC Virgin Atlantic VS21 is on the ground at LHR after crack in the windscreen.
UPDATE 11:53UTC Virgin Atlantic VS21 to Washington is returning to UK due to crack to the windscreen.
ALERT Virgin Atlantic #VS21 to Washington is returning to UK. Live: http://t.co/lhUGrbMAVT pic.twitter.com/Tvlhkf95uk
— AirLive.net (@airlivenet) September 28, 2015