Honda's Dan Cammish topped the timesheets in the morning session from Thruxton, with 29 of the 30-car Kwik Fit British Touring Car Championship contingent working through comprehensive testing programmes.
The annual official TOCA Test Day at the Hampshire circuit yields the opportunity for teams and drivers to acclimatise themselves to Thruxton's unique characteristics ahead of the calendared race weekends in May and August.
It was Halfords Yuasa Racing that hit the ground running with Cammish setting a time 0.685 seconds quicker than the next fastest driver - BMW's Colin Turkington.
"It's always nice to be quickest. We went very well here last year and did a good job. Matt (Neal) was on pole. Out of the box this morning, the car felt very strong.
"We're working through our programme and there were a few laps in there that would have been good enough for pole.
"Shame about the little bit of damage. Matt had an issue with his car and jumped into mine and I think he got caught in traffic there before a little off. It's fine, though, just a small prang!
"As a driver, I've come long way since this time last year and so has the car. We've made improvements over the winter and we'll see a bit more from it here.
"As a package we should be strong. Right now I'd have to say I'm glad we're coming here twice."
Tom Ingram notched the third quickest time in the new Toyota Corolla, expertly catching a major moment through Church - the fastest corner at the fastest circuit in the country - in the process.
Ash Sutton rounded in fourth with Rory Butcher and Tom Oliphant completing the top six.
The afternoon's running is set to get under way at 1510 and all of the timing can be found at btcc.net/live.
2019 Kwik Fit British Touring Car Championship – Testing – Morning, Thruxton Circuit
1 Dan CAMMISH (GBR) Halfords Yuasa Racing 1m15.292s
2 Colin TURKINGTON (GBR) Team BMW +0.685s
3 Tom INGRAM (GBR) Team Toyota GB with Ginsters +0.870s
4 Ashley SUTTON (GBR) Adrian Flux Subaru Racing +0.913s
5 Rory BUTCHER (GBR) Cobra Sport AmD AutoAid/RCIB Insurance +1.011s
6 Tom OLIPHANT (GBR) Team BMW +1.058s
7 Andrew JORDAN (GBR) BMW Pirtek Racing +1.193s
8 Aiden MOFFAT (GBR) Laser Tools Racing +1.228s
9 Jason PLATO (GBR) Sterling Insurance with Power Maxed Racing +1.275s
10 Sam TORDOFF (GBR) Cobra Sport AmD AutoAid/RCIB Insurance +1.295s
11 Jake HILL (GBR) TradePriceCars.com +1.383s
12 Rob COLLARD (GBR) Sterling Insurance with Power Maxed Racing +1.460s
13 Josh COOK (GBR) BTC Racing +1.632s
14 Adam MORGAN (GBR) Mac Tools with Ciceley Motorsport +1.641s
15 Stephen JELLEY (GBR) Team Parker Racing +1.665s
16 Senna PROCTOR (GBR) Adrian Flux Subaru Racing +1.727s
17 Ollie JACKSON (GBR) Team Shredded Wheat Racing with Gallagher +1.764s
18 Tom CHILTON (GBR) Team Shredded Wheat Racing with Gallagher +1.775s
19 Chris SMILEY (GBR) BTC Racing +1.792s
20 Matt SIMPSON (GBR) Simpson Racing +2.161s
21 Daniel ROWBOTTOM (GBR) Cataclean Racing with Ciceley Motorsport +2.253s
22 Bobby THOMPSON (GBR) GKR Scaffolding with Autobrite Direct +2.409s
23 Jack GOFF (GBR) RCIB Insurance with Fox Transport +2.448s
24 Nicolas HAMILTON (GBR) ROKiT Racing with Motorbase +3.352s
25 Mark BLUNDELL (GBR) TradePriceCars.com +3.860s
26 Sam OSBORNE (GBR) Excelr8 Motorsport +4.051s
27 Rob SMITH (GBR) Excelr8 Motorsport +4.122s
28 Matt NEAL (GBR) Halfords Yuasa Racing NO TIME
29 Michael CREES (GBR) GKR Scaffolding with Autobrite Direct NO TIME
