Simon Bridges sets up an independent review into the National Party's workplace culture to make sure women can feel safe and confident to come forward following the Jami-Lee Ross saga.

National has written to expelled MP Jami-Lee Ross, rejecting his offer to use his proxy vote in Parliament.

Ross's supporters believe it is the first step towards triggering the waka jumping legislation to remove Ross from Parliament, though National insists it was unrelated.

In a statement, a spokesman said: "The National Party will not be casting Jami-Lee Ross's proxy vote.

KEVIN STENT/STUFF MP Jami-Lee Ross's proxy vote offer to the National Party has been shot down.

"Mr Ross is no longer a National MP, having been expelled from the Caucus on 16 October and resigning his membership of the National Party on the same day.

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"The Party's decision not to accept his vote is unrelated to the waka jumping legislation. No decision has been made on that."

Sources close to Ross say he received the letter Thursday but was not intending to take any immediate action.

The letter arrived while Ross is on mental health leave, after earlier suffering a breakdown over allegations about his treatment of women.

Ross was later expelled from the caucus after leader Simon Bridges accused him of leaking details of his travel expenses.

ROSS GIBLIN/STUFF National Party Leader Simon Bridges accused Ross of leaking details of his travel expenses.

The letter from party whip Barbara Kuriger informed Ross that he must confirm with the Speaker that he was no longer a member of the National caucus.

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