Tommy Hill has maintained his reign atop the British Superbike leaderboard following the first day of action around Knockhill.

Inclement weather conditions continued to hamper proceedings, though lap times were generally faster than that of the opening practice session.

Even so, Hill remained fastest on the Swan Yamaha as the only rider to break 53secs with his effort of 52.810secs, three tenths faster than second place R1 counterpart Loris Baz.

John Hopkins was once again on the pace aboard the Samsung Crescent Suzuki in third, ahead of Michael Laverty on the second of the Swan machines, while championship leader Shane Byrne completed the top five.

Josh Brookes lifted himself into the top ten in sixth, ahead of Ryuichi Kiyonari, while Gary Mason was also an improver between sessions as he placed himself eighth.

Simon Andrews assumed EVO honours on this occasion in a strong ninth aboard the PR Racing Kawasaki, while Jon Kirkham was tenth fastest, despite taking a spill at Leslies.

Elsewhere, BSB debutant Jake Zemke made notable improvements on the WFR Honda, moving up to 25th. More importantly, the American was seventh of the EVO runners, ahead of Thruxton double winner Barry Burrell and team-mate Graeme Gowland.