West Australian Liberal MP Dean Nalder will nominate for the party's leadership if a spill motion is put forward at a partyroom meeting on Tuesday.

Key points: One of Dean Nalder's colleagues likely to put forward spill motion on his behalf

One of Dean Nalder's colleagues likely to put forward spill motion on his behalf Mr Nalder not "consulted" on changes in policy direction that affected his portfolio

Mr Nalder not "consulted" on changes in policy direction that affected his portfolio Colin Barnett critical of both Mr Nalder and Mr Simpson

The ABC understands one of Mr Nalder's colleagues is likely to put forward a spill motion on his behalf.

Mr Nalder said he had not done the numbers on how many MPs would support him but he wanted the leadership and was ready to stand for it.

"The partyroom is the place where we scrutinise our decisions as a Government," he said.

"And if the partyroom does put a spill motion on Tuesday, I will nominate for the position of leader."

The first-term MP said he first considered the leadership earlier this year when Premier Colin Barnett told him that if the polls continued to go backwards he would look to step down.

"I was approached, I said, 'Look, if the Premier was to move aside it is something I would consider'," Mr Nalder said.

"From there, the jungle drums started going everywhere. I'm at a position where I can't continue any further with the current leadership."

Attempt to meet Premier 'unsuccessful'

Mr Nalder said there had been a number of changes in policy direction that affected his portfolio and he was not consulted on.

Dean Nalder says he is ready to stand for the leadership. ( ABC News: Robert Koenig-Luck )

"I just feel that I've been compromised in what I'm trying to work [on]," he said.

"There's no conversation, there's no consultation with myself or through Cabinet regarding some of these issues."

He said he had unsuccessfully tried to meet with the Premier for weeks to discuss several large infrastructure projects and the taxi industry reform bill, which he thought the Government was not bringing through fast enough.

Earlier today former Government minister Helen Morton accused staff in the Premier's office of bullying, intimidating and demoralising ministers, but would not name those responsible.

She said both Mr Nalder and Mr Simpson, who both quit Cabinet in the past two days over Mr Barnett's leadership, had been subject to threats from the Premier's office.

Referring to those allegations, Mr Nalder said he had expressed to Mr Barnett "my concerns as to the lack of respect afforded to ministers by his office".

Mr Barnett rejected Mrs Morton's allegations and described them as disappointing.

Stability the 'hallmark' of Barnett Government

He also said he had no intention of standing down as party leader.

Sorry, this video has expired Colin Barnett said he was not aware of any potential challenger

"I am leader, I am the Premier of Western Australia and I intend to stay there," he said.

Mr Barnett was critical of both Mr Nalder and Mr Simpson.

He said Mr Nalder has been a minister for a little over two years and had been given extraordinary opportunities in that time.

Mr Barnett said stability has been the hallmark of his Government.

"During that eight years there have been five prime ministers, there have been multiple changes of government and multiple changes of premiers in every other state," he said.

"Not so in Western Australia, and yet during that time we've gone through some difficult economic times.

"The global financial crisis – we survived that. And we've seen a rise to extreme levels and then a collapse in commodity prices that had a dramatic effect on our state, our economy and also on State Government finances and yet we've also survived that."