He was re-elected on four occasions before being defeated by the Australian Labor Party (ALP) candidate Sid Sidebottom at the 1998 election.

[1] He resigned his position in October 1994 in protest at the opposition's decision to support the government's Human Rights (Sexual Conduct) Bill 1994, which repealed Tasmania's sodomy laws.

[3] After the Coalition won the 1996 election, Miles was appointed parliamentary secretary to John Howard as prime minister.

[2] In the early 1990s Miles was a leader of the campaign against repealing Tasmania's anti-sodomy laws, organising "Say No To Sodomy" rallies in the state's North West.

[2] In 1999, Miles was appointed by the Howard government to a five-year term on the Foreign Investment Review Board, at which point he was the director of corporate development at Pacific Hills Education.

[2] His property Gaunts Farm at Nietta contains a hydroelectric system fed by a creek via a dam and pipeline, which "on average generates about 620kW an hour".