Richard Cooper opened the weekend with the best lap of the session, clocking a 1min 34.854sec lap to lead Ash Barnes by 1.039secs.
Aaron Silvester was third, Harrison Dessoy fourth and Rossi Banham fifth – as championship leader Edoardo Colombi ended the session ninth.
Pirelli National Sportbike with Moneybarn Vehicle Finance:
1. Richard Cooper (PHR Performance Triumph) 1min 34.854s
2. Ash Barnes (Raceways Yamaha) +1.039s
3. Aaron Silvester (MIH Solutions/Macadam Racing) +1.498s
4. Harrison Dessoy (Rev2Race Yamaha) +1.659s
5. Rossi Banham (RB Racing) +2.255s