British Transport Police

The British Transport Police (BTP) is a national special police force that polices railways and light-rail systems in England, Scotland and Wales, for which it has entered into an agreement to provide such services. Seventy five percent of the force's funding comes from Britain's privatised train companies. British Transport Police officers do not have jurisdiction in Northern Ireland unless working under mutual aid arrangements for the Police Service of Northern Ireland, in which case any duties performed on a railway will be merely incidental to working as a constable in Northern Ireland.