Click here for full BSB FP2 results from Oulton Park
Shane Byrne has pinched the top spot honours from Leon Haslam with his final lap in FP2 as Jake Dixon nearly stunned the whole MCE British Superbike paddock by almost finishing the session fastest.
The BSB championship leader had been consistently lapping in the top ten during the bulk of the session with an eye on race set-up but his late blast was enough to take the fastest lap time from Haslam by almost two-tenths with a 1m 34.685s.
Both riders needed their final flying laps to jump to the front after Briggs Equipment BMW's Jake Dixon came close to topping his maiden BSB session with a late 1m 34.860s to briefly top the timesheet.
Further back BSB Showdown contender Jason O'Halloran narrowly led Honda Racing team-mate for fourth and fifth respectively.
In a session run under the threat of dark rain clouds drizzle drifted in and out of Oulton Park without causing the need for wet tyres but was the likely culprit for blisteringly fast lap times.
After missing a large chunk of FP1 due to a spill Tommy Bridewell took sixth for Bennetts Suzuki ahead of Quattro Plant Kawasaki's Luke Mossey as ePayMe Yamaha's John Hopkins and Buildbase BMW's Richard Cooper completing the top ten.
Cooper's late gain edged Ellison into 11th while Showdown contenders Michael Laverty could only managed 14th on the Tyco BMW and Peter Hickman 16th on the third JG Speedfit Kawasaki after suffering a small off at Knickerbrook midway through the session.
Ryuichi Kiyonari on his debut for Smiths Racing BMW claimed 17th upon his return to action on the German machinery.