The rider from Blackburn has now reduced the lead of his Castrol-Honda team-mate, Aaron Slight, to just 22 points.
Fogarty said: "It's great to be back on the top step of the podium. I knew I could win and I wanted it for everyone, including the 10,000 British fans who have made the journey."
Slight pipped Troy Corser for third on the last lap, with John Kocinski finishing fifth. In the second race, Fogarty elbowed Kocinski and Corser out of the way to take the chequered flag first. "After leading for most of the race, there was no way anyone was going to beat me," Fogarty said.
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