A lawyer, Johnston has been in parliament since 2002. He became Minister for Justice and Customs in March this year, losing that post after the recent federal election.

Former Industry and Resources Minister Ian Macfarlane – a strong performer in this portfolio – has been given the post of Shadow Minister for Trade.

Nationals’ Leader Warren Truss will serve as Shadow Minister for Infrastructure and Transport.

Tasmanian Senator Eric Abetz becomes Shadow Minister for Innovation, Industry, Science and Research.

South Australian MP Greg Hunt becomes Shadow Minister for Climate Change, Environment and Urban Water.