Williams already on third Mercedes engine of testing
Williams has already been forced to move onto its third engine of pre-season testing after a string of issues with the Mercedes power unit.
Twelve months on from its disastrous start to testing after car build delays, Williams enjoyed a strong first week of running in Barcelona as the FW43 hit the track without any major car issues.
But the team suffered a setback on Wednesday morning when an oil system issue forced Nicholas Latifi to stop on track, causing a red flag.
Speaking on Wednesday afternoon following Latifi's issue, deputy team principal Claire Williams expressed her frustration over the recurring engine problems that had limited running.
"We had some engine problems which have been a little frustrating," Williams said.
"We're on our third engine issue now, which has obviously cost us quite a lot of track time, which is unfortunate.
"I suppose it is what can happen in testing, and at least it's not our issue that something has gone wrong with the car.
"Apart from that, it's gone well. We're covering the run programme as we can with the limited mileage that we've got. I would be happier if we had some more miles under our belt I suppose."
Williams has been forced forced into two engine changes through the four days of testing so far, having also suffered setbacks last Thursday and Friday.
Claire Williams confirmed the problems were being investigated by Mercedes, the team's power unit supplier.
"There were some other issues last week. The one on Friday, [Mercedes is] still investigating, so you should talk to them about that," Williams said.
"I don't think that they've found the problem. I think there was an issue with the MGU-H on the Thursday night one.
"There was a sensor issue on Friday morning that obviously was our issue. That put us off the track for probably half an hour, something like that. That's the only issue that we've had."
A Mercedes spokesman told Motorsport.com: "The issue that Williams encountered today is different to the one they experienced last week.
"The first assessment points towards an oil pressure issue. The PU is now back on its way to Brixworth where we will have the chance to take a more thorough look at it."
Williams was able to get back out on track for the afternoon session on Wednesday following the engine issue, with George Russell taking over from Latifi.
Kubica ends first day of second F1 test on top
Kubica says Alfa still has "something in the pocket"
How Ferrari's Monaco headache became its Silverstone migraine
OPINION: Ferrari won the British Grand Prix with Carlos Sainz, but it ultimately cost Charles Leclerc a chance to make a bigger dent in Max Verstappen's title lead by leaving the Monegasque out on old tyres towards the end. Like Monaco, indecision over strategy proved to be the Scuderia's biggest issue - and if the team doesn't reflect, the headache can only intensify
The five factors that won Sainz a British GP he’d twice lost
Formula 1 has a newest race winner, in a grand prix the victor appeared to have lost twice, only to charge back to headline a sensational and dramatic British Grand Prix. From a massive start crash to a late sprint finish, here’s how five factors saw Carlos Sainz take his maiden grand prix win
Why there was no case to answer in Aston's latest F1 copycat saga
The appearance of a revised Aston Martin in Spain caused controversy but PAT SYMONDS explains why the FIA investigation found the Silverstone team had no case to answer
Why it's Red Bull that really leads a three-way fight so far at Silverstone
After a slow start to Friday at Silverstone, all the Formula 1 teams had to effectively cram in a day’s worth of practice into one hour. But there was still plenty to learn and while Ferrari topped the times, a three-way battle is brewing ahead of the British Grand Prix
Verstappen exclusive: Why F1's champion isn't fazed by Silverstone return
Max Verstappen is the world’s number one racing driver… and he’s determined to keep it that way. Speaking exclusively to GP Racing's OLEG KARPOV, the Red Bull driver explains why he’s relishing the 2022 championship battle with Charles Leclerc – and why he’s not worried about returning to Silverstone, the scene of the biggest accident of his career last year
Why Red Bull’s RB17 hypercar can help its F1 team
On Tuesday, Red Bull laid out its plans to develop and build a new hypercar - the RB17 - penned by Adrian Newey. As the project itself sates Newey as a creative outlet, it also offers Red Bull's Formula 1 team a number of new and exciting avenues to pursue.
What to expect from Mercedes as F1 returns to Silverstone
OPINION: The British Grand Prix is a home event for Lewis Hamilton and George Russell, with their Mercedes team based just a few miles away too. But there’s another reason why the Silver Arrows squad is eager to arrive at Silverstone this weekend, which may help it fix its remaining problems with its 2022 Formula 1 challenger .
Inside AlphaTauri’s Faenza F1 factory
AlphaTauri’s mission in F1 is to sell clothes and train young drivers rather than win the championship – but you still need a cutting-edge factory to do that. Team boss Franz Tost takes GP Racing’s Oleg Karpov on a guided tour of a facility that’s continuing to grow.