America’s Julian Correa took early honours as he set the best lap in first practice to beat Alfie Davidson by more than half a second.
The Microlise Cresswell Racing rider banked a 1min 44.270sec lap to take him to the top of the timesheets, as Davidson held off third-placed Amanuel Brinton.
Ollie Walker was fourth fastest with Alexander Rowan fifth as the track continued to dry, with title leader Evan Belford completing just five laps.
R&G British Talent Cup, FP1:
1. Julian Correa (Microlise Cresswell Racing) 1min 44.270s
2. Alfie Davidson (Banks Racing) +0.610s
3. Amanuel Brinton (Kovara Projects/RS Racing) +1.650s
4. Ollie Walker (VisionTrack Racing Team) +2.259s
5. Alexander Rowan (Mortimer Racing Victoria House Academy) +2.308s