Today's TT practice and tomorrow's races have revisions following the cancelled practice last night.
Roads had been due to close at 6pm, but race organisers took the decision to use today's contingency schedule instead.
Last night's cancellation is the second to be cancelled this week.
Today's schedule means the Mountain Road closes at 11.15am, then at 12.30pm all roads around the course will shut.
Roads will reopen for a break at 4.30pm, before closing again on the Mountain from 5pm, all other roads from 6pm and reopening from 9.30pm.
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