Born in Scotland on 18 October 1945 to David Myles and Janet Duncan, Myles came to New Zealand with his family as an infant. He was educated at Papanui High School. In 1971 Myles married Colleen Kirker, and the couple had two children.
Member of Parliament
He was elected to Parliament for the seat of Roskill in the 1990 election as part of the New Zealand National Party, a previously safe-seat of the previously ruling Labour Party, largely on a platform of opposition to the "Rogernomics" economic reforms that had occurred during the 1980s in New Zealand. He openly identified with the pro-interventionist 'Muldoonist' faction of the National Party, once saying "I joined the National Party because of Sir Robert Muldoon". His campaign slogan was "Let's rescue Roskill". Myles, however, quickly fell out with the leadership of the National Party due to the party's own swing toward privatisation and the slashing of the Government's expenditure on social policy enthusiastically implemented by Finance MinisterRuth Richardson. His disgust with the continuation of these reforms by Prime MinisterJim Bolger led to his identification with the rebels within the National Party, like Michael Laws and Winston Peters, who together had major confrontations with the dominant neo-liberals within the party's relatively gargantuan caucus.
Independent
Eventually, the total breakdown of relations between Myles and the majority of the Government led to him and another dissident, Hamish MacIntyre, breaking away to become an independent in late 1991 and then proceeding to form the Liberal Party in 1992. The party failed to gain significant popular support, with the problem being that neither of the two MPs of the party had any significant political experience but also the emergence of the left wing Alliance party and Winston Peters continuing to criticise National from within.
During 1993, the Liberal Party merged with the much larger and far more left wing Alliance Party. Myles proceeded to quit the grouping within months in July, particularly over his somewhat conservativesocial values conflicting with the highly socially liberal policies of the Alliance. He immediately joined the populist New Zealand First party, founded by the now Independent Winston Peters. However he lost his seat during the 1993 election. Myles re-entered parliament for a brief period during 1999, following the total breakdown of the New Zealand First – National coalition government and the resignation of former NZ First MP turned Independent minister in the National governmentDeborah Morris over the prioritisation of military expenditure over social expenditure in the 1999 budget. Some controversy emerged as Morris issued a tape-recorded telephone conversation between her and Myles where he admitted that he would immediately quit NZ First upon arrival in Parliament and would support the struggling Jenny Shipley-led National Government.