The two airports vying to be chosen as the site for a new runway have both announced record-breaking passenger figures.
Heathrow had its best-ever May this year, with 6.34 million passengers passing through the west London airport - a 1.7% rise on the same month last year.
Gatwick also had a record-breaking May, with the West Sussex airport handling 3.6 million passengers - up 5.8% on its May 2014 figure.
For the 12 months ending May 2015, Heathrow handled 73.75 million passengers - a 1.1% increase on the 12 months ending May last year.
A total of 38.87 million passengers passed through Gatwick in the 12 months ending May 2015. This was 6.5% more than for the 12 months ending May 2014.