David Shoubridge doubled up with a second Ducati Performance TriOptions Cup win after seeing-off a charge from Max Lofthouse.
In a race which was stopped and restarted due to track contamination, Shoubridge fought back after being passed by Lofthouse in the opening lap to take control once again and eventually win by more than a second.
Behind, Tom Tunstall took third ahead of Mark Bridger as Michael Tustin rounded out the top five.
Ducati Performance TriOptions Cup, Silverstone Race 2:
1. David Shoubridge (Rich Energy Ducati)
2. Max Lofthouse (JDF Racing) +1.059
3. Tom Tunstall (Motorcycle Race Parts) +2.175
4. Mark Bridger (Moto46) +4.885
5. Michael Tustin (AH Performance/Breckland Utility Solution +5.130