Parliamentary and Diplomatic Protection ( PaDP ) was formed following a merger of the Diplomatic Protection Group ( SO6 ) with the Palace of Westminster Division ( SO17 ) in April 2015 . PaDP provide armed and unarmed protection of embassies , missions and the Parliamentary Estate . They also provide residential protection for high-profile Government ministers and are responsible for access control and security at Downing Street and New Scotland Yard . PaDP was the Command in which Police Constable Keith Palmer GM , who was killed in an attack at Westminster in 2017 , worked
attack at Westminster in 2017
2017 Westminster attack
Protection Command