Evan Belford drew first blood as the R&G British Talent Cup action returned, beating Lucas Brown to the top spot by 0.312secs.
In a busy session where Belford and Sullivan Mounsey took turns to lead, the latter eventually ended up third, with Amanuel Brinton fourth and Ollie Walker fifth.
R&G British Talent Cup, FP1 result:
1. Evan Belford (City Lifting/RS Racing) 1min 23.425s
2. Lucas Brown (Amphibian Scaffolding/SP125 Racing) +0.312s
3. Sullivan Mounsey (Wilson Racing/Maddison Media) +0.738s
4. Amanuel Brinton (Kovara Projects/RS Racing) +0.798s
5. Ollie Walker (VisionTrack Racing Team) +1.168s