Shane Byrne took a winning double in an incident-littered Oulton Park round of the Bennetts British Superbike Championship to tighten his grip on the crown.
The first race was stopped on the opening lap when five riders tipped off in three incidents, and with rain falling prior to the re-start, the teams gambled on tyre choice.
Tom Sykes led on his Rizla Suzuki but Cal Crutchlow nosed his HM Plant Honda ahead on the fourth lap, only to run wide at Lodge at half distance, giving the lead to Airwaves Ducati rider Byrne.
Byrne then held off the close attention of Leon Haslam to take the victory.
"I tried really hard to keep the bike upright and keep the win - it made for a really amusing race which I am pleased to have won," he said.
Sykes led the second race until a controversial attempted overtaking move by Leon Haslam saw the Suzuki rider crash out.
Haslam ran wide but was later excluded from his fourth-place finish by race officials who had studied the incident.
Crutchlow had the lead, but not for long before Byrne - who at one point had dropped back to 11th place after an error at the chicane - had nosed ahead on the 12th lap.
Next time round, Crutchlow crashed, sustaining ankle injuries, with the action red-flagged.
That meant Byrne was credited with the victory which gave him a 41-point championship lead over team-mate Leon Camier, who twice finished third on Monday.
Race 1 result: 1 Shane Byrne (Gbr) Ducati 32mins 29.161secs, 2 Leon Haslam (Gbr) Honda 32:29.365, 3 Leon Camier (Gbr) Ducati 32:31.765, 4 Michael Rutter (Gbr) Ducati 32:40.656, 5 Tom Sykes (Gbr) Suzuki 32:49.176, 6 Cal Crutchlow (Gbr) Honda 32:51.184, 7 Michael Laverty (Gbr) Suzuki 33:06.420, 8 James Ellison (Gbr) Honda 33:08.483, 9 Tristan Palmer (Gbr) Honda 33:23.189, 10 Stuart Easton (Gbr) Kawasaki 33:27.046, 11 Scott Smart (Gbr) Kawasaki 33:33.760, 12 Guy Martin (Gbr) Honda 33:44.603, 13 Atsushi Watanabe (Jpn) Suzuki 33:47.873, 14 Dave Johnson (Aus) Honda 33:48.728, 15 Steve Mercer (Gbr) Yamaha 33:55.144
Race 2 result: 1 Shane Byrne (Gbr) Ducati 21mins 13.862secs, 2 James Ellison (Gbr) Honda 21:18.109, 3 Leon Camier (Gbr) Ducati 1:21.889, 4 Leon Haslam (Gbr) Honda 21:22.014, 5 Michael Laverty (Gbr) Suzuki 19:46.411 +1 Lap, 6 Stuart Easton (Gbr) Kawasaki 19:46.841 +1 Lap, 7 Michael Rutter (Gbr) Ducati 19:47.670 +1 Lap, 8 Simon Andrews (Gbr) Yamaha 19:55.440 +1 Lap, 9 Scott Smart (Gbr) Kawasaki 19:56.376 +1 Lap, 10 Atsushi Watanabe (Jpn) Suzuki 19:58.817 +1 Lap, 11 Billy McConnell (Aus) Kawasaki 19:59.240 +1 Lap, 12 Tristan Palmer (Gbr) Honda 20:05.088 +1 Lap, 13 Steve Plater (Gbr) Yamaha 20:05.292 +1 Lap, 14 John Laverty (Gbr) Ducati 20:06.978 +1 Lap, 15 Luke Quigley (Gbr) Suzuki 20:07.189 +1 Lap
Riders' Championship standings: 1 Shane Byrne (Gbr) Ducati 95pts, 2 Leon Camier (Gbr) Ducati 56, 3 Michael Rutter (Gbr) Ducati 55, 3 Cal Crutchlow (Gbr) Honda 55, 5 James Ellison (Gbr) Honda 46, 6 Michael Laverty (Gbr) Suzuki 39, 7 Stuart Easton (Gbr) Kawasaki 34, 8 Leon Haslam (Gbr) Honda 33, 9 Tom Sykes (Gbr) Suzuki 29, 10 Tristan Palmer (Gbr) Honda 18
Manufacturers' Championship standings: 1 Ducati 95pts, 2 Honda 85, 3 Suzuki 45, 4 Kawasaki 34, 5 Yamaha 19
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