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Simon Bridges is talking to media at 1pm about the results of his party's inquiry into who leaked his expenses earlier this year.
The alleged leaker in August claimed to be a National MP. They say they leaked because Mr Bridges was "arrogant" and they disliked his leadership.
Mr Bridges has previously said he is confident a National MP isn't behind the leak, and early on blamed the Government.
Parliament Speaker Trevor Mallard ordered a separate inquiry, which ruled out his office and staff.
The National Party inquiry has been paid for by the taxpayer out of his leader's budget.
Watch the video.