Brayden Elliott topped the opening Superstock session at Donington Park, beating Billy McConnell to the top spot with a best lap of 1m:07.775.
Behind, points leader Tim Neave looked comfortable running third quickest, just ahead of Davey Todd, as Alex Olsen rounded out the top five.
Pirelli National Superstock Championship with MotoNovo Finance, Donington Park, Free Practice One:
1. Brayden Elliott, CFS Filtration No Bull Racing
2. Billy McConnell, C&L Fairburn Properties/Jackson Racing +0.017s
3. Tim Neave, Edwards Yamaha +0.059s
4. Davey Todd, Milenco by Padgetts Motorcycles +0.191s
5. Alex Olsen, FHO Racing with Kobelco +0.488s