Jonathan Rea completed a Donington Park hat-trick by winning Sunday's second race to extend his World Superbike Championship lead by nine points.
The Kawasaki-mounted Northern Irishman held off Turkey's Toprak Razgatlioglu to go 24 points ahead of Alvaro Bautista of Spain, who finished third.
Four-time world champion Rea was 16 points behind Bautista going into the weekend's Donington Park meeting.
Rea had started on pole after winning the earlier red-flagged sprint race.
He and Razgatlioglu exchanged the lead in the early stages but Rea stayed in front when he capitalised on a mistake from the Turkish rider on lap 12.
Alex Lowes was fourth whilst Leon Haslam completed the top five, only just ahead of Loris Baz.
Rea had moved ahead of the Spaniard at the top of the standings by winning race one at Donington on Saturday.
"I would have laughed if you had said to me before the weekend that I'd win three races here," Rea told Eurosport.
"I've had problems here before but I felt in good shape and I need to say a big thanks to my team because I had a great bike.
"I'm going to celebrate this victory when I get home tonight because you have to take stock of days like today."
Sunday's earlier sprint race was stopped with three laps to go when an oil spillage from Peter Hickman's bike caused a number of riders to come off.
Tom Sykes was removed from the results after coming off on the warm-down lap.
He had been second behind Rea when the red flag was raised but then went across the oil himself, came down and did not bring his bike back within the five-minute time limit.
It meant Razgatlioglu was awarded second place and Leon Haslam was third, with former championship leader Bautista in fourth.
|2019 WSBK Riders' Championship|
|Jonathan Rea (GB)||Kawasaki||376 pts|
|Alvaro Bautista (Spa)||Ducati||352|
|Michael van der Mark (Ned)||Yamaha||206|
|Alex Lowes (GB)||Yamaha||192|
|Leon Haslam (GB)||Kawasaki||187|
|Toprak Razgatlioglu (Tur)||Kawasaki||153|