Australia's construction union has been put on notice by Prime Minister Malcolm Turnbull over reported delays at sites for the 2018 Commonwealth Games.

The Construction, Forestry, Mining and Energy Union (CFMEU) has repeatedly been accused of delaying construction at several sites on the Gold Coast, threatening to blow out taxpayer-funded budgets for the projects. While Games organisers have claimed there is space in their budgets for such delays, Mr Turnbull has used a…