Career
He worked as a director of a family shirt manufacturing company. He was elected to Craigavon Borough Council in 1973, and held his seat until he stood down in 1989. He stood for the party in Fermanagh and South Tyrone at the Northern Ireland Constitutional Convention election in 1975, but was not elected.
He then moved to Armagh, which he contested at the 1979 United Kingdom general election, but took only 8.6% of the vote.
In 1987, he was seriously injured in an assassination attempt on his life by the Irish National Liberation Army, but recovered fully. He fell out with the Democratic Unionist Party in 1993, in a dispute over candidate selection, and was expelled from the party.
Calvert stood as an independent candidate in Craigavon at the 2001 local elections, and narrowly missed taking a seat. He stood again in 2005, without success.
In 2006, he attended a meeting of critics of the Belfast Agreement, addressed by Robert McCartney of the United Kingdom Unionist Party, but at the Northern Ireland Assembly election, 2007 he stood as an independent again, this time in Upper Bann, taking 3.1% of the vote.
Following the elections, Calvert joined Traditional Unionist Voice, and stood for the party in a by-election to Craigavon Borough Council in January 2010, taking a distant second place.
