David Allingham kept himself at the top of the opening day timesheets this afternoon as he powered to a best lap of 1min 35.553secs.
After leading the way in first practice, the SMS/Nicholl Oil BMW rider stayed ahead, leading Lewis Rollo by 0.391secs at the end of the session.
Declan Connell was third quickest, with Josh Owens fourth as Luke Mossey rounded-out the top five.
Pirelli National Superstock Championship, combined practice:
1. David Allingham (SMS/Nicholl Oil BMW) 1min 35.553s
2. Lewis Rollo (Motorrad Central Edinburgh by Mlav Racing) +0.381s
3. Declan Connell (Rapid Honda with Drivelife) +0.422s
4. Josh Owens (SAF Holland Honda) 0.571s
5. Luke Mossey (Milenco by Padgetts Motorcycles) +0.735s