Kenneth Clifford Earl (29 August 1933 – 30 July 2015)[1] was an English actor who appeared in numerous television programmes and films.

[6] Earl appeared in the TV series Doctor Who twice: as the Station Sergeant in The Daleks' Master Plan in 1965, and as Major Branwell in The Invasion in 1968.

[8] In 1953, aged 19, Earl was among the servicemen who volunteered to take part in experiments at the Porton Down military research centre which he believed were related to the common cold but in fact involved exposure to nerve agents such as sarin.

Unknown to Earl at the time, in the same sequence of tests another serviceman, Ronald Maddison, died soon after exposure to the poison.

[5] Much later, in 1999, police began Operation Antler to investigate the experiments; on learning of this, Earl founded the Porton Down Veterans Support Group.