The debate over a third runway at the airport has pitted environmentalists and voters in affluent west London against the country's biggest businesses and some politicians who see expansion as vital for economic growth.
Local communities invited activists to stay in the area after the 2009 Climate Change Camp. Two years later activists established the off-grid community "Grow Heathrow" to support local villages opposing the airport's expansion.
. A man overlooks the protest camp.
The prime minister ruled out a new Heathrow runway in 2009, saying "no ifs, no buts," but a government-appointed commission has since recommended a third runway, rejecting alternatives such as expanding Gatwick, south of London.
. A man and a woman hug in one of the camp's buildings.
. An activitist washes dishes at the camp.
Heathrow's chief executive told lawmakers in November he was confident that an expanded Heathrow would be able to meet EU air quality limits, but campaign groups such as Stop Heathrow Expansion says air pollution levels in some places close to Heathrow are already above the legal EU limits.
. Despite an eviction case from England's High Court against Grow Heathrow, activists still remain at the camp.