Lord Peter Carrington KG GCMG CH MC PC DL , 6th Baron Carrington is a British Conservative politician. He served as British Defence Secretary between 1970 and 1974, British Foreign Secretary between 1979 and 1982 and as the sixth Secretary General of NATO from 1984 to 1988. He is the last peer to have held one of the four Great Offices of State. He is also the last surviving member of the Cabinets of both Harold Macmillan and Sir Alec Douglas-Home. Following the House of Lords Act 1999, Carington was created a life peer as Baron Carrington of Upton. He is currently the longest serving member of the House of Lords and is the second-longest-serving member of the Privy Council after HRH The Duke of Edinburgh.