The Liberal National Party MP who helped lead the campaign to legalise same-sex marriage accused former prime minister Malcolm Turnbull of using last-minute delaying tactics against the law and then claiming credit when it was passed.

In a sign of the anger within the Coalition at the former leader's tell-all memoir, A Bigger Picture, northern Queensland MP Warren Entsch accused Mr Turnbull of "hypocrisy" for his positions on allowing homosexual couples to marry in 2017, and energy policy changes that triggered his removal from office in 2018.