Alex Olsen held off points leader Dan Linfoot to top the timesheets in free practice one, banking a best lap of 1min 26.694secs to lead the way by 0.129secs.
Richard Kerr ended the opening session in third place, more than half a second adrift of Olsen’s time as Joe Talbot was fourth, just ahead of fifth-placed Alastair Seeley.
Pirelli National Superstock with Santander Consumer Finance, FP1 result:
1. Alex Olsen (Cumins by Team IWR Honda) 1min 26.694s
2. Dan Linfoot (Optimum Bikes Racing Ltd) +0.129s
3. Richard Kerr (AMD Motorsport) +0.608s
4. Joe Talbot (JR Performance Racing) +0.713s
5. Alastair Seeley (SYNETIQ BMW Motorrad) +0.859s