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Luke Mossey has jumped to the top of the timesheet at Oulton Park in the midday test session, edging out round one race winner Peter Hickman in a tightly-contested session.
The Quattro Plant Kawasaki produced a late flyer to pinch the fastest time from the JG Speedfit Kawasaki rider by just over a tenth of a second, while less than two seconds separated the top 21 riders combined.
The MCE British Superbike title dark horse Christian Iddon continued to chip away at his personal times to take third fastest overall just ahead of Hickman's team-mate and Silverstone pole sitter Leon Haslam.
Morning timesheet topper Michael Laverty shook off a late crash in the opening session to complete the top five ahead of Buildbase BMW's Richard Cooper and his former team-mate Ryuichi Kiyonari.
Lee Jackson enjoyed another impressive session to take eighth ahead of RAF Reserves BMW's Alastair Seeley as ePayMe Yamaha's John Hopkins rounded out the top ten.