MI5
Is é MI5 seirbhís slándála na Breataine.

Stiúrthóirí-ginearálta
 1909–1940: Vernon Kell (r. 1873–b. 1942)
 1940–1941: Oswald Allen Harker (r. 1886–b. 1968)
 1941–1946: David Petrie (r. 1879–b. 1961)
 1946–1953: Percy Sillitoe (r. 1888–b. 1962)
 1953–1956: Dick White (r. 1906–b. 1993)
 1956–1965: Roger Hollis (r. 1905–b. 1973)
 1965–1972: Martin Furnival Jones (r. 1912–b. 1997)
 1972–1979: Michael Hanley (r. 1918–b. 2001)
 1979–1981: Howard Smith (r. 1919–b. 1996)
 1981–1985: John Jones (r. 1923–b. 1998)
 1985–1988: Antony Duff (r. 1920–b. 2000)
 1988–1992: Patrick Walker (r. 1932)
 1992–1996: Stella Rimington (r. 1935)
 1996–2002: Stephen Lander (r. 1947)
 2002–2007: Eliza Manningham-Buller (r. 1948)
 2007–2013: Jonathan Evans (r. 1958)
 2013–: Andrew Parker (r. 1962)

Féach freisin
 MI6

 
Seirbhísí faisnéise na Ríochta Aontaithe