Max Cook got the weekend off to a flying start as he stormed to the fastest lap in first free practice, beating Aaron Silvester by 0.252secs with a 1min 19.439sec lap.
Third quickest was Louis Valleley, ahead of Sam Laffins with Cameron Hall fifth.
Pirelli National Superstock Championship with MotoNovo Finance, Thruxton, FP1:
1. Max Cook (Uggly & Co by Binch Pro) 1m 19.439s
2. Aaron Silvester (A&J Racing) +0.252s
3. Louis Valleley (Team Val-Tech Racing/Mortimer Racing) +0.296s
4. Sam Laffins (Cheshire Mouldings Kawasaki by JR Performance) +0.970s
5. Cameron Hall (Triple M Vehicle Sales) +0.993s