Edoardo Colombi beat Richard Cooper in his first ever race at Cadwell Park after a last lap pass to extend his championship lead to 4.5points.
The race had been following a red flag when Rhys Stephenson crashed on the Mountain on the second lap, taking Harrison Dessoy with him and was restarted over 10 laps.
Cooper hit the front on the first lap and held the lead all the way to the penultimate lap, when the Italian got past. Cooper got back ahead at the start of the final lap but Colombi rode around him coming into Park and held the lead to the flag.
Thomas Strudwick was third with Alfie Davidson fourth as Aaron Silvester crossed the line fifth.
Pirelli National Sportbike with Moneybarn Vehicle Finance, Race result:
1. Edoardo Colombi (Gradara Corse Asd)
2. Richard Cooper (PHR Performance Triumph) +0.167s
3. Thomas Strudwick (TS Racing) +5.665s
4. Alfie Davidson (IN Competition/SENCAT Aprilia) +11.670s
5. Aaron Silvester (MIH Solutions/Macadam Racing Triumph) +12.268s