West Australian Federal MP Luke Simpkins says he will move a spill motion against Prime Minister Tony Abbott next week.
There are reports Mr Simpkins, the member for Cowan will be backed by another WA Liberal MP, the member for Canning, Don Randall.
Mr Simpkins said in an email to party colleagues the knighthood for Prince Philip was “the final proof of a disconnection with the people”.
“I think we must bring this to a head and test the support of the leadership in the party room,” he wrote.
The MP has submitted to the chief government whip a motion to spill all of the leadership positions of the party, including the deputy role held by Julie Bishop.
Mr Simpkins said it should be a secret ballot.
More to come