Ryan Frost picked up where he left off at Silverstone last week as he led the way in FP1 this morning.
The points leader, who won both races last weekend, clocked a best lap of 1min 22.158secs to go 0.106secs clear of Jack Burrows.
Jack Dunabie was third fastest with Marco Holt fourth and Mason Foster fifth.
R&G Moto4 British Cup, FP1 result:
1. Ryan Frost (Fibre Tec Honda by MLav Racing) 1min 22.158s
2. Jack Burrows (Burrows Engineering/RK Racing) +0.106s
3. Jack Dunabie (Kovara Projects/RS Racing) +0.356s
4. Marco Holt (City Lifting/RS Racing) +0.867s
5. Mason Foster (Mortimer Racing) +1.453s