Evan Belford shot to the top of the timesheets in free practice one as he led Carter Brown by almost a second.
Belford clocked a best lap of 1min 47.566secs to beat Brown, as Harrison Crosby finished the session third.
Fourth fastest was Ollie Walker, just ahead of Filip Surowiak.
Honda British Talent Cup, Donington Park, FP1:
1. Evan Belford (City Lifting by RS Racing) 1min 47.566s
2. Carter Brown (MLav VisionTrack Academy) +0.801s
3. Harrison Crosby (Banks Racing) +1.293s
4. Ollie Walker (SP 125) +1.586s
5. Filip Surowiak (MJL Racing) +1.858s