Karl Harris dominated free practice ahead of the seventh round of the Bennetts British Superbike Championship as it returned to Oulton Park for a second visit of the season. The Rob Mac Racing Yamaha rider was fastest in each of the two sessions, running with a best time of 1m 36.716secs, an average speed of 100.20mph around the 2.692 mile Cheshire circuit, as he outpaced the leading duo in the title chase by a little over a tenth of a second.