James McManus will line up in pole position for the first race of the weekend after beating Kieran Kent to the top spot with a lap of 1m:18.532s.
Kieran Smith will round out the front row, as Jack Roach starts from fourth alongside Mikey Hardie in fifth.
HEL Performance British Junior Supersport Championship with Motocourse, Donington Park, Qualifying:
1. James McManus, Completely Motorbikes/Affinity
2. Kieran Kent, D&P Lovell Kent Racing +0.303s
3. Kieran Smith, Smith Twins Racing +0.373s
4. Jack Roach, Completely Motorbikes/Affinity +0.450s
5. Mikey Hardie, Completely Motorbikes/Affinity +0.454s