Roads are reopening around the course after this afternoon's practice session.
Davey Todd led the way in the superbikes, with a 16:54.079 lap, giving a speed of 133.942mph - with Peter Hickman close behind with a 133.851mph lap.
A practice session is due to be held this evening, with the Mountain Road closing from 5pm.
The rest of the course will shut at 6pm and reopen no later than 9.30.
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