‘Budgie Nine’ member and Christopher Pyne staffer, Jack Walker, has quit his post.
He was among a group who stripped to their Malaysian flag emblazoned speedos after Daniel Ricciardo won the Grand Prix recently.
Walker handed in his resignation after returning home on Saturday.
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Mr Pyne released a statement saying “Jack Walker has today offered me his resignation and I have accepted it”.
“Jack indicated to me his deep regret for causing any embarrassment to the government and apologised.
“One lapse of judgement does not detract from the fact that Jack has been an outstanding staff member, a significant contributor to my office since late 2013 and I believe he will have a bright future.”