Mikey Hardie held off Kieran Kent to take the spoils in the second Junior Supersport race of the weekend.
Hardie beat Kent by just 0.134secs in a close finish, as Harry Cook took third just a half a second behind.
Points leader James McManus finished fourth to keep himself eight points clear at the top of the points as Christian Smith rounded out the top five.
HEL Performance British Junior Supersport Championship with Motocourse, Snetterton, Race Two result:
1. Mikey Hardie (Completely Motorbikes/Affinity)
2. Kieran Kent (D&P Lovell Kent Racing) +0.134s
3. Harry Cook (McAMS Yamaha Junior Team) +0.817s
4. James McManus (Completely Motorbikes/Affinity) +1.255s
5. Christian Smith (Smith Twins Racing) +1.580s
Championship points after Round 10:
1. James McManus 170
2. Charlie Atkins 162
3. Kieran Kent 155
4. Mikey Hardie 128
5. Jack Roach 78