Postpublished at 15:17 Greenwich Mean Time 30 March 2019
Second runs. Who will survive, who will fall?
Ferrari's Leclerc takes maiden F1 pole position
Vettel 2nd in other Ferrari, Hamilton and Bottas 3rd and 4th for Mercedes
Out in Q2: Ricciardo, Albon, Gasly, Perez, Kvyat
Out in Q1: Giovinazzi, Hulkenberg, Stroll, Russell, Kubica
Bottas won opening race of season in Australia
Get involved: #bbcf1
Michael Emons
Second runs. Who will survive, who will fall?
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Panic over for Hamilton, up to third, +0.767 off Leclerc's leading mark.
Mercedes taking no risks with Valtteri Bottas, who is sent out again. Lewis Hamilton had no choice so he's back out there.
The debate continues...
The comparisons keep on coming...
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Five minutes to go, with one run left, and these are the bottom five...
Jeroen Demmendaal: Grosjean is in for a penalty. Typical.
Eme Te: That's surely a penalty for Grosjean for blocking Norris.
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Grosjean is under investigation for blocking Norris, who says "this guy just blocked me in the final corner". Followed by a bit sweary stuff.
Something must have gone wrong with Lewis Hamilton's first flyer as he's down in eighth, below Sainz, Magnussen, Verstappen and Grosjean. That won't be enough just yet so will have to go again.
Charles Leclerc is currently top man with a 1:28.495, Vettel is 0.238 behind, with Bottas third, a second off Leclerc. That's those three through safely.
Romain Grosjean gets in Lando Norris' way, right in the racing line of the teenager.
Alonso just can't keep away. Back on the track next year? You just never know.
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Alexander Albon and George Russell have set times, Robert Kubica was out there, but no time is next to his name and he's now back in the pits. Still 12 minutes left.
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Wow - the comparison is uncanny!
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Claire Williams watches on hopefully, but it would be a massive shock if either of her cars progresses out of Q1, judging on what we've seen so far this weekend.
Jolyon Palmer
Former Renault driver on BBC Radio 5 live
What caught Red Bull and Pierre Gasly out in Melbourne was that the track evolution was so high and he didn't make it out of Q1.
Here we go. Eighteen minutes of Q1. The top 15 will move on into Q2, the day will end earlier than planned for five drivers.
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Perfect conditions.
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Listen along by pressing the play button at the top for our commentary with Jack Nicholls and Jolyon Palmer.