Born in Ayr, Tosh was educated at Kilmarnock Academy and the University of Glasgow, where he was president of the Liberal Club and graduated with a second-class honours degree in history and politics.[1][2] He trained as a schoolteacher at Jordanhill College in Glasgow, and for nearly 25 years taught history at several schools in Ayrshire. Before being elected to the Scottish Parliament he was head of the history department at Belmont Academy in Ayr.[1]
At the inaugural election for the Scottish Parliament in 1999, Tosh stood as the Conservative candidate for Cunninghame South, where he came third; instead, he was elected to Holyrood as one of four candidates on the party's South of Scotland regional list. Regarded as being on the Conservative left, he was convener of the Procedures Committee during his first parliamentary term. In the debating chamber his contributions often tended towards the histrionic: Robert McNeil, writing for The Scotsman, described him as "a great source of unwitting entertainment, gesturing like Mussolini on a balcony, as he wound himself up into ludicrous fits of passion about drains, minor roads and paper-clips."[6]
In 2001, he announced his intention to stand down at the next election so that he could return to local government, prompting speculation that he was unhappy about the selection of right-winger Iain Duncan Smith as national party leader.[7] However, he unexpectedly won the race to become a Deputy Presiding Officer that same year, defeating Cathy Peattie by 68 votes to 45, which led him to reverse his earlier decision to leave Holyrood.[5][8] Press reports attributed his victory to the heavy-handed attempts by the Labour Party leader, Jack McConnell, to force his MSPs to support Peattie en masse, which prompted a backlash from several of them amid public allegations of 'cronyism'.[5][9]
Tosh remained a Deputy Presiding Officer for the next six years, until the end of the second parliament in 2007. In that year's elections, he was the Conservative candidate for Dumfries, where he was defeated by Elaine Murray, the Labour incumbent. Having been placed a lowly fourth in the party's South of Scotland regional list, he therefore did not return to Holyrood as an MSP for the 2007–2011 session.[citation needed]
Later years
In 2011, Tosh was one of those who backed Ruth Davidson's bid to become leader of the Scottish Conservative Party, describing her as a "breath of fresh air in Scottish politics".[10]