Davey Todd powered to the top of the combined Superstock timesheets with a best lap of 1m 28.158s, beating Billy McConnell by almost half a second.
Charlie Nesbitt ended the day third behind McConnell, with Tom Ward fourth and Lewis Rollo fifth.
Pirelli National Superstock Championship with MotoNovo Finance, Cadwell Park, combined practice:
1. Davey Todd (Milenco by Padgetts Motorcycles) 1m 28.158s
2. Billy McConnell (C&L Fairburn Properties/Jackson Racing) +0.452s
3. Charlie Nesbitt (VisionTrack Suzuki) +0.490s
4. Tom Ward (IN Competition/Aprilia +0.744s
5. Lewis Rollo (Milenco by Padgetts Motorcycles) +0.769s