Charles Leclerc runs a little wide in the Ferrari. As does rookie Gabriel Bortoleto.

All good though with the pair.

Carlos Sainz has jumped up to sixth spot, he's set a time of 1:31.407.

Lance Stroll is sill in the Aston Martin garage, he's not in a massive rush to get out on track.

Will Charles Leclerc remain on top for this afternoon session or will someone else jump to the top? We have under 50 minutes left for the drivers to complete some laps and set times.

And we are back.

Pierre Gasly is the first one out on track.

Session will resume at 18:10 local time.

The floodlights are coming on but there's some rain too.

If I'm correct, only two teams have brought wet tyres with them.

Again, like the power cut, this was not expected.

Cars are still parked up in the garages, as floodlights are slowly turning on across the track.

There's just under an hour left of the afternoon session.

A safety car is making it's way around the track.

Here is the first official picture of the new driver line-up.

Are you giving a thumbs up to the class of 2025?

Image source, Formula 1

I can agree with you there Cameron. Let us know your thoughts by using #BBCF1

Flood lights are slowly turning on, could we get some running in the last hour?

Cameron: I've definitely seen some strange things happen during F1 testing. From the computer virus that Marussia got hit with in 2014 to Alonso's mystery crash in 2015. Now we have a power cut this time round at Bahrain and that's definitely one of them now.

Isack Hadjar is sat in his Racing Bulls car and has his eyes closed. Bless him, I don't think he was expecting a power cut on his first drive as an F1 driver.

Image source, Getty Images

Alex Albon put in a strong performance in the morning session.

He set fast laps before finishing third, with a lap time of 1:31.573.

He also completed 63 laps.

Some floodlights have come on, some have not.

The skies are darker now that the sun has set.

Some drivers have got back into their cars, the clock is still ticking down, one hour and 18 minutes remains of the afternoon session.

Image source, Getty Images

Oscar Piastri completed his time in the McLaren this morning, so the Australian gets to watch on this afternoon as team-mate Lando Norris gets his turn in the team's 2025 car.

"It's been a little bit tricky, yes, but I think the car is feeling pretty good," Piastri told Sky Sports. "We're just trying to get in to a better window.

"Obviously this red flag is not ideal but it's a similar story for everybody. I think we're in OK shape; there are a few teams looking good early on but I think we're pretty happy with how it's going on.

"Lando hasn't done too many laps but we're pretty much on the same page, which is what you want. Everything is working as it should, which is probably the most important thing for today.

"Early doors but I think we're pretty happy. But it's just hard to know who's doing what. I think we're doing a good job of focusing on ourselves."

Red Bull's Liam Lawson had a big spin in the morning session. He seemed to have lost control at the end of turn three but managed to stay out of the gravel.

Image source, Getty Images

The lights are back on in the garages! Will we get some more running time?

The floodlights haven't come on yet...

Ferrari's Charles Leclerc wen the fastest overall on day one of testing, so far.

He set a lap time of 1:30.878 and competed 32 laps before the session was red flagged due to a power cut.

Image source, Getty Images

Chris Medland
F1 journalist in Bahrain

Well this is a new one. Suddenly, the power goes out at the track and a number of alarms are tripped.

The red flag is immediately thrown to suspend the session and the pit lane becomes very busy, although it’s not that easy for mechanics to see what they’re doing in dark garages.

Race control has also lost power, although a number of the pit walls are running on their own back-up generators.

Image source, BBC Sport

Sky Sports have grabbed George Russell during the delay. This is what the Mercedes driver made of the circuit-wide power cut:

"I came out the pits and thought 'it's suddenly quite dark out here', and I radioed saying I need to change my visor, and I realised there are no floodlights around.

"Would have been a bit hectic if this was an hour later and the sun had already set."

Image source, Getty Images

Here's the Red Bull garage in the dark because of the power cut.

I don't think anyone saw this coming.