Mark Adrian Cotterill (born 3 October 1960) is a far right political figure who has been involved in a number of movements throughout his career. He is noted for activity to establish links between the far right in Britain and America, by founding the American Friends of the British National Party.
Cotterill was a member of the National Front (NF) from 1977 to 1979 and again from 1984 to 1992, and was the party's South West England organiser from 1985 to 1991. He “helped promulgate the New Atlantic Charter, signed between the National Front and the Nationalist Movement, pledging Anglo-American solidarity” and was “instrumental in arranging the exchange visit of (Nick) Griffin to America”.
In 1992 Cotterill left the NF and formed the Patriotic Forum. The Patriotic Forum was largely composed of fellow ex-NF members, such as Darren Copeland (as Chairman), Keith Jowsey (as Secretary), and Alan Harvey. The Patriotic Forum published a right-wing conservative magazine entitled British Patriot which Cotterill edited, and which also featured articles by Steve Brady and Alan Harvey.
Alan Harvey had formed the short-lived White Rhino Club, which supported apartheid in South Africa; Harvey later accused Cotterill of sabotaging the Club's activities, but without substantiating the claim. In turn Cotterill expelled Harvey from the Patriotic Forum. Cotterill was, for a short time, a member of the Conservative Party in Torquay in 1993, and was active in the Revolutionary Conservative Caucus. In 1994 he was attacked, receiving severe head injuries, by two members of Anti-Fascist Action who were subsequently "charged with unlawful wounding". He stood as an Independent Conservative in the local elections in 1995.
Cotterill wound up the Patriotic Forum and ceased publication of British Patriot, in 1995.