Mr Ramsay, an Upper House Member for Western Victoria, had been pre-selected to contest the seat at the November state election and his decision means the Liberals will hold another pre-selection to replace him.

Opposition leader Matthew Guy had asked Mr Ramsay to consider his future after he was charged by police with driving with an alcohol reading of 0.19.

Mr Ramsay said he was “deeply remorseful for my actions and apologise for my error of judgement.

“I also regret any embarrassment and hurt caused to my family, friends, colleagues and the Liberal Party.”

He said he was proud of the work he had done with the parliament’s Drugs and Crime Prevention Committee into the supply and use of methamphetamine.

It had also been a privilege to have worked on important issues like protecting CFA volunteers, he said.

“It has been a great honour to represent the people of Western Victoria.

“Eight years ago, working on my farm, I realised I could do more for farmers and country Victoria.  

“Promoting and protecting our regional communities has been core to my effort.

“I want to thank my colleagues for their kindness during this difficult time and will continue in this term supporting the important work being done by Matthew and our parliamentary team.”

Mr Ramsay had gained pre-selection for the first spot on the Coalition ticket for Western Victoria. He won pre-selection unopposed last year. 

Under the Liberals’ agreement with the Nationals, the Liberals get the first, second and fourth spots on the ticket and the Nationals third and fifth spots.