Mercedes' George Russell was on a flying lap and topped the leaderboard, but not for too long.

Lewis Hamilton whizzed down the circuit in his Ferrari, he set the fastest time in sector one and three and returns to the top spot.

Carlos Sainz is now out on track. He's on a fast lap and has gone purple on sector one.

But he's not quite fast enough to top the leaderboard.

Esteban Ocon, Yuki Tsunoda and Liam Lawson are the drivers on track.

Ocon has completed 35 laps. Tsunoda 27 and Lawson is on 28.

Oscar Piastri, who had the fewest laps, has now completed 20 laps. He's back into the garage.

His engineers seem to be crowded around the front of his car.

Lewis Hamilton locks up into turn one but is back on his way around the track.

Carlos Sainz is on the hard tyres and is running laps around the circuit.

Fernando Alonso nearly runs into a bit of traffic but he passes by with ease.

The weather is not clearing up but all 10 drivers are out on the track.

"It's starting to rain more now"

McLaren have now joined the pack.

Oh dear, Oscar Piastri runs wide after hitting a damp spot on the track.

He has set a lap time now, though. It's a 1:32.719 for the Australian driver.

Tsunoda's car has been painted with some flow-vis paint.

The way the paint flows, while he is out on track, will give his engineers important information on air flow around the car.

Racing Bulls' Yuki Tsunoda is the next driver to make his way around the track.

George Russell has banked 35 laps so far.

George Russell seems to be managing just fine on the track.

Nico Hulkenberg is the next driver out to join him, in his green Sauber.

We have action. George Russell has jumped back in his Mercedes and is back out on the track.

Image source, Getty Images

It's not long now until lights out.

The first race of the 2025 Formula 1 season is the Australian Grand Prix at Albert Park in Melbourne, which takes place 14-16 March.

With an 11-hour time difference between the UK and Melbourne, the race starts at 04:00 GMT.

Friday, 14 March (all times GMT)

First practice - 01:30-02:30

Second practice - 05:00-06:00

Saturday, 15 March

Third practice - 01:30-02:30

Qualifying - 05:00-06:00

Sunday, 16 March

Race - 04:00

1. Lewis Hamilton (Ferrari) - 1:30.080

2. Carlos Sainz (Williams) +0.072

3. George Russell (Mercedes) +0.299

4. Pierre Gasly (Alpine) +0.766

5. Liam Lawson (Red Bull) +1.153

6. Nico Hulkenberg (Sauber) +1.445

7. Fernando Alonso (Aston Martin) +2.862

8. Esteban Ocon (Haas) +3.961

9. Yuki Tsunoda (Racing Bulls) +7.881

10. Oscar Piastri (McLaren) no time set

Oscar Piastri is not in his car. He's sat on the pit wall with a pair of headphones on.

It's a good opportunity for the drivers to talk to their engineers, while we wait for them to get back out on the circuit.

There is about two hours to go of the morning testing.

• Lewis Hamilton is fastest in the Ferrari, with a lap time of 1:30.080.
• Williams' Carlos Sainz second, ahead of George Russell in the Mercedes.
• Russell has completed 28 laps, the most so far.
• Rain has made the track slippy.
• Haas' Esteban Ocon has been on track with green intermediates bolted on.
• Sainz and Red Bull's Liam Lawson are on a full day of testing.

Ocon returns back into the garage. Teams are busy working away at their cars.

While we wait for action, shall we have a recap of what has happened this morning?

Esteban Ocon comes into the pit lane and he is back out on the track.

He is the only driver out on the circuit.

Oh, we have some action! The green intermediates have been bolted onto Esteban Ocon's Haas.

He's making his way around the track.