Karl Harris returned to the top of the timesheets in morning warm-up ahead of the second ViSK.com British Superbike Championship round at Oulton Park.
Save for qualifying, the Hydrex Honda rider has topped each session of the weekend so far, but with damp conditions forecast for the races, Harris got good practice on a similar surface to go five tenths quicker than pole sitter Leon Camier.
With more than three seconds covering the top ten, Jon Kirkham was third quickest on the Jentin Yamaha, ahead of Glen Richards and James Ellison, while Gary Mason returned to the top ten as the best of the Cup runners.
Chris Walker was seventh quickest, but would stop out on circuit in the final seconds, while Sylvain Guintoli, Stuart Easton and Ian Lowry completed the top ten positions.
Race one takes place at 13.00GMT.