Postpublished at 14:52 British Summer Time 4 June 2023
Lap 36/66
Lance Stroll makes another pit stop, allowing Sergio Perez to further advance through the field. The Mexican also made a few overtakes of his own and is now running in fifth place.
Max Verstappen claims fifth win of season to extend championship lead over Red Bull team-mate Sergio Perez to 53 points
Lewis Hamilton finishes a strong P2 in upgraded Mercedes
Hamilton's team-mate George Russell finishes P3 from 12th on starting grid
Perez P4, Sainz P5, Stroll P6, Alonso P7, Ocon P8, Zhou P9, Gasly P10
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Lorraine McKenna
Lap 36/66
Lance Stroll makes another pit stop, allowing Sergio Perez to further advance through the field. The Mexican also made a few overtakes of his own and is now running in fifth place.
Lap 35/66
Both Mercedes are in the podium places! George Russell takes his strike on the Ferrari of Carlos Sainz and third spot is in the bag.
Marc Priestley
F1 commentator on BBC Radio 5 Live
The guys looking good are the two Mercedes. They are the big surprise in a positive sense.
Ferrari not so good, and not really looking like any threat to the Mercedes of Hamilton and could even come under threat from George Russell.
Lap 34/66
Yuki Tsunoda and Zhou Guanyu are having great races in the Alpha Tauri and Alfa Romeo. Tsunoda is up to eighth - although he has just been passed by the Red Bull of Sergio Perez - and Zhou is in the final points position in 19th.
Marc Priestley
F1 commentator on BBC Radio 5 Live
Both Aston Martins are stuck in no-man's land and they're going to have to go on to an alternate tyre for the last part of the race... unless of course we get rain.
Lap 33/66
Some good news for the perspiring George Russell is he can have a crack at the Ferrari of Carlos Sainz in about two laps' time.
"Is anyone else reporting rain? I think its sweat from inside my helmet!"
Lap 32/66
Oh dear. George Russell wants to know if anyone else is reporting rain? Nope, sorry George, says his engineer, looks like you're just a bit of a sweaty Betty in the cockpit.
#BBCF1
Matthew Murnaghan: If a heavy shower somehow surprises everyone, then this will be the first Spanish Grand Prix since 1996 where it actually rained.
Nulla Pax: Oh no - not rain - not some chaos...
Lap 31/66
One thing Max Verstappen rarely does is make a mid-race mistake. So unless he has a rare off day in Barcelona, that 13-second advantage he has over Lewis Hamilton in second will continue to grow.
Lap 30/66
George Russell completed a move on Lance Stroll to nab that P4 position a moment ago.
Max Verstappen is on the hard tyres, the two Mercedes and Carlos Sainz are yellow medium runners and Lance Stroll is driving around with the soft rubber fixed to his Aston Martin.
Marc Priestley
F1 commentator on BBC Radio 5 Live
Verstappen has given himself the option by going medium, he's able to run long and if we haven't had the level of degradation expected, he's now given himself the position where he can throw the hard tyres on and run to the end.
I think that's a masterstroke.
1. Max Verstappen (Red Bull)
2. Lewis Hamilton (Mercedes)
3. Carlos Sainz (Ferrari)
4. George Russell (Mercedes)
5. Lance Stroll (Aston Martin)
Lap 29/66
Lewis Hamilton gets the better of Carlos Sainz at Turn One and moves up to second place, pushing the Ferrari man down in third. The Mercedes is starting to go off into the distance. Hamilton versus Verstappen would be a great end to this race.
"Rain at Turn 5"
Lap 28/66
Now Sergio Perez is in for dry tyres but George Russell has a message for us...
Lap 27/66
Just Sergio Perez now who hasn't made his way to the pit lane for a stop.
Lap 27/66
Come in, Max Verstappen. Your time is now. Hard-compound tyres for the race leader and he rejoins the track back where he start at the front of the pack.
Lap 26/66
A second call for Mercedes as George Russell also swaps from the softs to the mediums. The Briton comes out behind Lance Stroll and into sixth place.
Marc Priestley
F1 commentator on BBC Radio 5 Live
A real positive for Mercedes - this is a real test of a raft of upgrades in Monaco.
Has it proven that those upgrades has helped them look after those tyres on a circuit that is notoriously difficult to do so?
Either way it puts them in a really good position as the race progresses but Hamilton versus Sainz is the real battle for the podium that I will keep a close eye on.