Tom Booth-Amos will start from pole in today’s Sprint race after securing P1 with a 49.213sec lap.
The Gearlink Kawasaki rider held off a charging Luke Stapleford to claim pole, as Rhys Irwin finished third.
Jamie Perrin ended the session in fourth position to head the second row, as Ben Currie starts fifth.
In GP2, Joe Collier was again fastest, ending in ninth position overall, with Cameron Fraser second and Harry Rowlings third.
Quattro Group British Supersport & British GP2 Championships, qualifying:
1. Tom Booth-Amos (Gearlink Kawasaki) 49.213s
2. Luke Stapleford (Profile Road & Racing Performance) 49.264s
3. Rhys Irwin (Astro-JJR Suzuki) 49.303s
4. Jamie Perrin (Astro-JJR Suzuki) 49.335s
5. Ben Currie (Oxford Products Racing Ducati) 49.386s