20 February, 8am: Steven Joyce announced he's in the leadership race on RNZ's Morning Report.
19 February, 2.40pm: Mark Mitchell has now announced that he's running for leader. Says he's had strong support, was approached three weeks ago to consider standing in the event of Bill English resigning.
19 February, 12.55pm: It's been a bit quiet over the weekend. But Mark Mitchell is poised to make an announcement at 2.30pm in Orewa. Still no word from Steven Joyce. We've put together a MP Endorsement Tracker to keep up with any public endorsements from MPs for a specific candidate. We appreciate there's a lot of speculation about how many votes each candidate might have behind the scenes, but we're no really able to count those.
15 February, 3.40pm: Jonathan Coleman has ruled himself out of the leadership race.
14 February, 3.35pm: Amy Adams has announced she's running for leader. She was joined at the announcement with Nikki Kaye, Maggie Barry, Chris Bishop, and Tim Macindoe, the first show of support from any MPs for a leadership candidate
14 February, 11am: Simon Bridges has announced he's running for leader.
14 February, 10:30am: Correction: RNZ only say that Mark Mitchell had confirmed he's considering making a bid, but only after he's visited his daughter in Australia. I misread their tweet!
14 February, 9.45am: Newstalk ZB has Steven Joyce saying he's considering options on running for the leadership.
Over the coming days I'll try to put together a quick graphic as and when news breaks about who's in and who's out of the National Party's leadership contest. I'll endeavour to update it as and when announcements are made, though I'm still recovering from a nasty illness and injury so will be entirely dependent on whether I'm able to get out of bed.
The above is based on publicly reported statements that I've seen on Twitter. Where an MP hasn't yet made any statement (e.g. Amy Adams hasn't said anything at all on the race) I've opted to not include them in any of the boxes.