The Mayor of London will announce his chosen hub airport options for submission to the Davies Commission on the future of aviation capacity in the UK this morning.
According to a report in The Telegraph, Boris Johnson will reveal that he believes a new airport on the Isle of Grain in North Kent has the "greatest potential."
The move could put the mayor on a collision course with David Cameron, who removed Transport Secretary Justine Greening from her position last year after she campaigned against expansion at Heathrow.
More top news
Rescue teams in Snowdonia have found the body of a hiker who had not been seen since last Sunday.
As the skies clear overnight then temperature's will drop
A woman thought to be travelling to Syria with four children has appeared in court charged with child abduction.