A third runway could allow airport to expand to 150 million passengers a year, nearly double the current scale

Bosses at Heathrow say growing the airport will boost the economy, but they face opposition from campaigners and the Mayor of London

Heathrow airport has unveiled plans for a £49bn expansion that includes building a third runway and rerouting Britain’s busiest motorway, telling ministers they needed to “clear the way for take-off”.