David Allingham stormed to the top of the timesheets in first practice, as he set a hot lap of 1min 35.365s.
The SMS/Nicholl Oil BMW rider beat Luke Mossey by just 0.061secs, as Jamie Perrin was third fastest.
Josh Owens clocked the fourth best time as Tom Ward rounded out the top five.
Pirelli National Superstock Championship, FP1:
1. David Allingham (SMS/Nicholl Oil BMW) 1min 35.265s
2. Luke Mossey (Milenco by Padgetts Motorcycles) +0.061s
3. Jamie Perrin (APS/ CDH Racing Honda) +1.382s
4. Josh Owens (SAF Holland Honda) +1.478s
5. Tom Ward (Armada Racing Honda) +1.517s