When interviewed later on the BBC Leila Deen described the move as a "last resort" after the democratic process failed. She said that Mandelson was an unelected politician and he was siding with the "interests of business" rather than the "interests of the people and the planet" in backing the new runway.
She justified the "direct action" as the best way of bringing about change, claiming she and others were excluded from the democratic process. "When democracy is failing you have to resort to any means necessary as long as it is peaceful and does not harm other human beings," she said.
She continued, "Peter Mandelson is the same person who effectively bullied Ed Miliband and other members of the cabinet to accept a third runway that nobody wants, a third runway that no one was consulted on and no one is able to say no to. It's not right that someone like Peter Mandelson can stand up and talk about being green."