Davey Todd picked up where he left off a fortnight ago as he charged to the top of the FP1 timesheets, with a best lap of 1min 30.317secs.
Todd ended the session 0.180secs up on Tom Ward, with Joe Talbot third.
Josh Owens continued to get back to grips with the class as he ended the opening session fourth, with Jamie Perrin fifth.
Pirelli National Superstock with Moneybarn Vehicle Finance, FP1 result:
1. Davey Todd (Cheshire Mouldings BMW by TAS Racing) 1min 30.317s
2. Tom Ward (Armada Marine Cables Racing) +0.180s
3. Joe Talbot (JR Performance Racing) +0.201s
4. Josh Owens (IN Competition/SENCAT Aprilia) +1.168s
5. Jamie Perrin (Jamie Perrin/Team APS) +1.188s