Nine climate change activists have been arrested after chaining themselves to railings on the north runway at London's Heathrow Airport.
Thirteen members of activist group Plane Stupid cut a hole in a fence at around 3.30am and lay down on the tarmac. The campaigners, who were protesting against airport expansion, were cut free and removed by police.
A video posted online showed several activists chained together and being spoken to by an officer.