Jack Dunabie stayed ahead this afternoon as the lap times tumbled in the second free practice session.
After leading FP1, Dunabie clocked a 1min 35.438sec lap in FP2 to end the day 0.831secs clear of Harrison Day.
Luke Fitchett emerged third with George Bowes fourth and Ryan Frost fifth.
R&G Moto4 British Cup, combined practice:
1. Jack Dunabie (Kovara Projects/RS Racing) 1min 35.438s
2. Harrison Day (LRA Moto supported by HV Solutions) +0.831s
3. Luke Fitchett (Kovara Projects/RS Racing) +0.898s
4. George Bowes (A Edwards Racing) +0.950s
5. Ryan Frost (Fibre Tec Honda by MLav Racing) +0.985s