text: Campaigners from action group Plane Stupid staged the demonstration on Monday in opposition to the airport's expansion plans.
  The men and women have been charged with aggravated trespass and entering a security restricted area of an aerodrome, police said.
  They will appear in court on 19 August.
  The protest took place on the northern runway at 03:30 BST on Monday.
  The Metropolitan Police said security at the airport would be reviewed.
target: Thirteen people have been charged after climate change protesters stormed onto the runway at Heathrow Airport and chained themselves together.