We may have mentioned this a few times today but there's yet ANOTHER sideways moment for Hamilton in the Merc. This time he has to correct the car on the exit of the Turn 10 left-hander.
But something a little more familiar is the look of the new Mercedes W15 - there is definitely a touch of the McLaren MP4-19 from 20 years ago about it with the tweaked colour scheme. Well I think so anyway...
Of all the cars on this year's grid, there's certainly no mistaking the Sauber! You can see the lurid green of Bottas's machine from a mile off and at least means we won't be confusing it with anything else this year. Bottas is currently eighth but has put on the C2 tyres for this run so is unlikely to improve.
Ricciardo is on a very different run plan to the rest of the field. The RB has been looking impressive so far this test, but is some 6.7s shy of the outright pace today and is currently the only driver circulating with the hardest of the rubber.
Speaking of Ocon, he's just completed a very cautious prep lap but is now setting some green mini-segments so could be rising up from his current ninth spot on the leaderboard.
In terms of laps completed so far today in the disjointed session, it's Ricciardo who leads the way on 29, with Ocon's Alpine completing the fewest at present with 14.
We mentioned Albon's lack of laps so far this week a little while ago and the Williams driver has now ventured out again and improved to sixth spot with his latest effort on the middle-of-the-range C3 rubber.
Sure enough, the Canadian ends up being eight tenths behind the Ferrari at the conclusion of the lap, but it's still an improvement in time, even if he stays fourth.
Hamilton's second attempt on the C5s - yes, it's a rare sighting of the very softest compound - is a bit more successful as he climbs to third with a 1m31.999s, but there were still a couple of wide moments along the way.
Hamilton has bolted on the soft tyres for this latest run but it's not a good start for the Merc driver as he locks up slightly into Turn 1, completely misses the corner and skates wide. Not exactly ideal.
So, the teams have faced more disruption this morning with the latest drain cover woes and the squad feeling that the most is Williams, which has completely significantly fewer laps than the rest so far. In fact, Albon has only registered 53 tours over the test and will be keen to avoid any further interruptions.
With my time steering the ship up, I'll hand over to the capable Stephen Lickorish. But as I had one more obscure F1 tester primed earlier before the resumption of activities, I'll unleash him on you as my farewell. It's Corvette Racing legend Oliver Gavin aboard a Renault at Silverstone in 2002, for those scrambling to recall the familiar helmet livery.
Test driver Oliver Gavin (GBR) driving the Renault R202.
Sainz is quickest in all three sectors so far, as well as having the quickest outright lap. But he won't be improving this time around after a big front-right lockup into Turn 8 that drags him well wide of the apex.
One thing the teams will need to have in the back of their minds is the time it will take to get the cars readied for the second driver to take over. A quick endurance racing pitstop this isn't. And with no lunch break now to perform those duties, at what point will they decide to perform the switch?
Hamilton is clearly pushing and gets a big old slide on at Turn 4 as his Mercedes drifts out wide beyond the circuit confines. No penalty for that today of course, but that lap would be discounted next week in a qualifying scenario.
All 10 cars have now exited the pitlane as teams seek to make up for lost time. We have a little over seven hours of testing left, so it's time to make it count.
A bit of news now. But sadly not about the track. Max Verstappen has had his say on the new RB20 that his Red Bull team has produced, and needless to say he's pleased with the way it has pushed the limits. You can read more on that here.
If you remember Marcel Lasee's F1 test debut for Jordan at Barcelona in 2002, you qualify for elite anorak status. He finished ahead of Tonio Liuzzi in the 2001 German Formula Renault 2.0 championship, but his career never took off after that as he recorded just 10 points across the next two seasons in German F3.
Marcel Lasee (GER) made his debut Formula One test with the Jordan team in last year
Given he holds a mechanical engineering degree, there were worse people that the Prost team could turn to for sorting out its Peugeot-powered AP04 than CART Indycar racer Oriol Servia in 2000. The Spaniard was highly underrated in this writer's view, and scored his only win at Montreal in 2005.
