A senior government MP has announced his retirement as the polling gap tightens between the coalition and Labor.
Veteran Queensland MP Ian Macfarlane has decided not to contest his seat of Groom at the next election after 18 years in parliament, nine of which he spent as a minister.
Mr Macfarlane missed out on a ministerial job when Malcolm Turnbull ousted Tony Abbott for the Liberal leadership in September.
He then sought to join the Nationals, which was endorsed by his local party members but thwarted by state party officials.
"When you've become a passenger it's time to get off and let someone else drive ... sitting on the backbench wasn't an option for me," Mr Macfarlane told ABC radio on Monday.
Six Liberal MPs and two Nationals have signalled they won't contest the election due around September, with nine ALP members also retiring.
The deadline for NSW Liberals wanting to recontest their seats is this Friday.
Robert charged taxpayers for Qld mine trip
Dumped Liberal minister Stuart Robert reportedly spent more than $1600 of taxpayers money to fly to the opening of a north Queensland goldmine in which he and his family had bought shares.
Department of Finance documents show Mr Robert made claims on the public purse for return flights from Brisbane to Townsville on April 10, 2013, the day he visited the $200 million Mt Carlton mine of gold producer Evolution Mining, The Australian newspaper reports.
Mr Robert charged $1091 for the flights from Brisbane to Townsville and return to Brisbane and chalked up Comcar limousine charges of $205 and a further $376 travel allowance for a night in Brisbane before inspecting his private investment, the report said.
At the time he was opposition spokesman for defence, science technology and personnel, with no official role related to the mine, which he had bought shares in the previous year.
Mr Robert had close ties with one of Evolution Mining's directors at the time, Paul Marks, who had more than six million shares in the company and funnelled large donations to the Liberal and Nationals parties, The Australian said.
Mr Robert last week quit the Turnbull government front bench after it was found he breached ministerial standards on a 2014 trip to China.
The opposition has asked the Australian Federal Police to investigate his interest in a company which signed a mining deal at a ceremony in Beijing which he attended.
