Border Force staff at Heathrow start strike action
Members of the PCS union walked out at 05:00 BST in a dispute over working conditions.
BBC News
Border Force (BF) is a British law enforcement command within the Home Office, responsible for frontline border control operations at air, sea and rail ports in the United Kingdom. The force was part of the now defunct UK Border Agency from its establishment in 2008 until Home Secretary Theresa May demerged it in March 2012 after severe criticism of the senior management.
Members of the PCS union walked out at 05:00 BST in a dispute over working conditions.
More than 300 Border Force officers are due to walk out from Monday to Thursday.