The Mountain Road will close at 11am this morning after wet surfaces meant a delay to racing.
The rest of the course is now due to shut at midday before a course inspection lap at 12.45pm.
If all goes according to plan, the Superstock race will get away from 2pm, with a two-lap sidecar race at 4pm.
There'll then be the supertwin race over two laps at 5.30pm with roads due to reopen no later than 9.30pm.
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