Occasional: Would love to see F1 return to Malaysia. An awesome track with the added bonus of the most unpredictable weather.

Adrian: Definitely return to Adelaide, in my humble opinion. There was never a dull moment around that place.

#bbcf1

The marshals have done their job with clearing the stricken Ferrari after Charles Leclerc's Turn 15 prang. The Italian Grand Prix winner will have to sit out the rest of this first practice session, along with Esteban Ocon over at Alpine, which now has 25 minutes left.

Green light. Off you go again.

Andrew Benson
BBC F1 correspondent

Image source, Getty Images

Leclerc has had a crash, which is not great, but this is the least bad time to have a crash - as long as he doesn't do it again in free practice it won't harm him too much.

Leclerc crashes at Turn 15published at 11:01 British Summer Time 13 September

11:01 BST 13 September

The Ferrari is nose-first in the wall at Turn 15 as the marshals leg it over to start clearing the car. Charles Leclerc was too quick on his way into the corner and tells his pit wall: "I took the dirt on the outside".

Ben Edwards
F1 commentator on BBC Radio 5 Sports Extra

Off has gone Leclerc - it's another red flag. He has been setting great pace, but he has damaged the front end but he is OK.

Red flagpublished at 10:57 British Summer Time 13 September

10:57 BST 13 September

Charles Leclerc is in the wall at Turn 15. The Ferrari driver is climbing out safely and walking away but that's a hefty Friday hit for the three-time Baku polesitter.

Well, a busy morning in morning already. Sky Sports has said the piece of debris that caused the red flag possibly came from Franco Colapinto's Williams.

At the top of the timesheets, Charles Leclerc is quickest with a 1:46.608 from the Red Bull of Max Verstappen and the Mercedes of George Russell. All cars are running the medium tyres.

Esteban Ocon is experiencing some difficulties in the Alpine. The Frenchman says he has lost power and is slowly making his way back to the garage. He arrives safely and the crew get to work assessing the problem.

Meanwhile, a yellow flag is waved down at Turn Seven. Carlos Sainz needs to do a spot of reserving in order to manoeuvre his Ferrari out of trouble after locking up before the corner.

Image source, Getty Images

Lawrence Stroll unveiled the latest piece in his Aston Martin puzzle on Tuesday: Formula 1 design genius Adrian Newey.

The 65-year-old's new contract carries the title of managing technical partner and is said to be worth up to a possible £30m a year.

Newey, who negotiated an early exit from his Red Bull contract in April, has also become an Aston Martin shareholder.

Stroll said the money paid out for Newey is a "bargain" and added he has "never been more certain" about a decision he made during 30 years in business.

"It is relatively inexpensive for everything Adrian brings," the Canadian billionaire said.

Cars are back out on to the Baku street circuit now.

Before the red flag, we heard Lance Stroll bemoan the handling of his Aston Martin, saying it was "not a car right now". What he needs is a genius car designer...

Red flagpublished at 10:48 British Summer Time 13 September

10:48 BST 13 September

George Russell is back in the Mercedes garage but the Briton flags to his mechanics there is something causing him discomfort in his left elbow.

Out on track, a marshal makes a dash to pick up a stray piece of debris, which is very small and looks to be a rogue piece of metal.

Ben Edwards
F1 commentator on BBC Radio 5 Sports Extra

Looks like there is debris out there on track - doesn't look like a manhole cover this time.

The 5 live F1 team want to return to Argentina and to Buenos Aires for an F1 race - what track and country would you like reinstated as part of the F1 calendar?

Red flagpublished at 10:44 British Summer Time 13 September

10:44 BST 13 September

The red flag has been waved but it doesn't seem to be for a crash. Looks like there could be debris on the track - we'll find out shortly.

"Bottoming level is quite high," says Oscar Piastri to McLaren to the pit wall.

Meanwhile, over at Aston Martin, Lance Stroll is more blunt with his early assessment. "This is not a car. This is not a car right now," says the Canadian.

There was a brief yellow flag in sector one but looks like a driver has just taken a short trip to the escape road before the track goes green again. It was the Sauber of Valtteri Bottas, who executes a smooth move to back himself out of trouble.

Lewis Hamilton is a medium runner and is top of the timesheets 1:47.618, but the Mercedes man has highlighted the same issue with his seat his been struggling with for the past few races - it's very hot.

Image source, Getty Images

Franco Colapinto, himself a short-term stand-in over at Williams, has a rookie friend on the grid this weekend in Oliver Bearman.

The Argentine has taken the place of Logan Sargeant for the remainder of the season and passed his first test last time out in Italy, finishing a respectable 12th place and avoiding any costly prangs or damage.

Colapinto has never raced in Baku, while teenager Bearman has won twice at the street circuit in Formula 2.

"From the outside, it was a very clean weekend. On the inside, I hit the wall every single session," said Bearman. "So I'm going to be trying to tone that down a little bit. And yeah, just have a clean weekend and enjoy it as well."

For newbie Colapinto, his goal on the challenging track is to "build up slowly".

He added: "I haven't been on many street tracks, but I hope to have done enough prep in the simulator and to have worked really hard with the team to done enough to be on the pace quick."

Andrew Benson
BBC F1 correspondent

Image source, Getty Images

Charles Leclerc, he has had three poles in a row here - he is my favourite for pole again and maybe even the win this weekend. It should be a very competitive weekend. Red Bull - who knows what form they are going to show.

Oscar Piastri is first on the team radio to tell the McLaren pit wall the track is "very, very low grip" as he puts some early rubber down on the medium compound.

BBC Sounds

Welcome back to Ben Edwards on commentary this weekend.

For Friday's practice action, Ben will be joined by F1 journalist Rebecca Clancy BBC F1 correspondent Andrew Benson.

BBC Radio 5 Sports Extra, BBC Sounds and at the top of the page is where you'll find the team, or you can ask BBC Sounds to play Azerbaijan grand Prix practice one via most smart speakers.