Elite Motorsport's Alex Kattoulas topped the times on the first day of pre-event testing at Donington Park on Thursday, ahead of the GB4 Championship season opener at the circuit this weekend.
The Japanese-Greek contender set his best time, a 1m28.098s right at the end of the first session of the day this morning, and while his Elite Motorsport teammates Ary Bansal and Isaac Phelps topped the next two sessions, Kattoulas' session one time remained unbeaten.
He ended up just over a tenth clear of Phelps' session three time, while Fortec's Thomas Ingram Hill, who led much of session one, ended the first day in third.
Bansal's session two effort put him fourth on the combined time sheets, 0.045s away from the top-three and just over a tenth clear of Douglas Motorsport's Luke Hilton.
Hillspeed's Dan Guinchard was next up, 0.002s in arrears and 0.039s clear of the second Fortec machine of Jack Taylor.
Single-seater newcomer Stefan Bostandjiev, who will prioritise GB3 this year but will make his open wheel debut this weekend with Pace Performance was an impressive eighth quickest, a tenth ahead of Arden's 2024 podium finisher Leon Wilson.
Graham Brunton Racing's Mayer Deonarine completed the top-10, which was covered by 0.739 seconds. The top-12 drivers, including Leandro Juncos (Hillspeed) and Callum Baxter (Graham Brunton Racing) were all within a second of the pace. A total of 25 drivers participated in today's test.
Testing resumes tomorrow, with three more sessions.
GB3 Championship, partnered by the BRDC, Donington Park Thursday combined testing result:
1. Alex Kattoulas, Elite Motorsport, 1m28.098s
2. Isaac Phelps, Elite Motorsport, +0.103s
3. Thomas Ingram Hill, Fortec Motorsports, +0.197s
4. Ary Bansal, Elite Motorsport, +0.242s
5. Luke Hilton, Douglas Motorsport, +0.372s
6. Dan Guinchard, Hillspeed, +0.374s
7. Jack Taylor, Fortec Motorsports, +0.413s
8. Stefan Bostandjiev, Pace Performance, +0.629s
9. Leon Wilson, Arden Motorsport, +0.734s
10. Mayer Deonarine, Graham Brunton Racing, +0.739s
11. Leandro Juncos, Hillspeed, +0.756s
12. Callum Baxter, Graham Brunton Racing, +0.794s
13. Enzo Hallman, Douglas Motorsport, +1.127s
14. Alex O'Grady, KMR Sport, +1.174s
15. Ava Dobson, Arden Motorsport, +1.205s
16. Megan Bruce, KMR Sport, +1.497s
17. Jason Pribyl, ADM, +1.546s
18. Dayton Coulthard, Douglas Motorsport, +1.659s
19. Luca Magnussen, Fortec Motorsports, +1.695s
20. Alex Berg, Graham Brunton Racing, +2.060s
21. Josh McLean, Pace Performance, +2.095s
22. Holly Miall, Fox Motorsport, +2.196s
23. Lily-May Watkins, KMR Sport, +2.781s
24. Caitlyn McDaniel, Fox Motorsport, +3.547s
25. Neirin Evans, Rossoverde Scorpio Racing, no time recorded (no transponder)