Be Wiser Ducati's Scott Redding surged through the field in today's first Bennetts British Superbike race to beat Xavi Fores to victory in a red-flag-shortened scrap.
The former GP rider charged through from 11th on lap two to lead over the line on lap 18 just before rain halted play.
Fores shot forward from second to lead into Redgate, but Tyco BMW's Iddon rocketed off the second row to tuck in behind as pole-sitter Bridewell went third.
But Bridewell, who just missed out on a podium yesterday, passed Iddon into Roberts on the first lap before eclipsing Fores into Redgate at the start of lap two.
Fores soon made his way back ahead at the bottom of Craner as Iddon followed him through into second, while behind the trio Mackenzie made inroads and the front four began to break away slightly.
Just behind, JG Speedfit's stand-in Hector Barbera and Be Wiser Ducati's Josh Brookes tussled for fifth as the Australian got the better of the Spaniard before catching and passing Mackenzie for fourth at the end of lap six before Mackenzie got it right back at Redgate.
Mackenzie then made a move on Iddon to take over third, but Iddon sat up Mackenzie as he shot inside of the Scotsman at Starkey's before Mackenzie had him right back.
But their scrap allowed Brookes to pass Iddon for fourth just as Bridewell passed Fores to take over the lead with eight laps in the bag.
Meanwhile, catching the top four was yesterday's winner Redding, who had gone from 11th on lap two up to fifth as he passed Iddon and began to hunt down Mackenzie.
Redding powered past Mackenzie at Redgate on lap 12 and continued to scythe past team-mate Brookes at Craner four laps later.
At the front, Fores out-braked Bridewell at Roberts to hit the front just moments before Bridewell fell into the clutches of Redding, who passed him at the Old Hairpin on lap 17 as rain began to fall in sector two.
But Redding's charge wasn't finished there and just before the end of lap 18 he dived up the inside of Fores to lead.
But moments later, marshals threw the red flags to halt the race with rain beginning to fall steadily.
A result was declared with Redding bagging his second win on the trot over Fores and Bridewell.
Brookes settled for fourth ahead of McAMS Yamaha's Mackenzie, while Iddon and Jason O'Halloran secured sixth and seventh.
Spaniard Barbera, Smith's BMW man Hickman and Keith Farmer rounded out the top 10.
