Well they've backed the runway plan by 415 to 119, so Boris's absence made no odds. However, I don't think Boris needs to steel himself just yet to lay in front of the 'dozers. There will be "environmental impact" enquiries, judicial reviews, High Court challenges, further reviews, more prevarication. Boris and all the current mob will have long sailed off into the sunset before a single turf is lifted - if indeed it ever is.
Meanwhile "hub" air traffic that should rightly go via Heathrow will go to places like Schipol (where there are six runways, the latest added in 2003 and where the terminals and piers continues to grow. This prevarication, endemic in UK politics, will see the decline in the UK's share of European air traffic. And before anybody says, it has nothing to do with Brexit. The issue has been batted about for fifty years and will probably still not be resolved in the next fifty.