The incident happened yesterday evening during a practice session
Police have arrested a local man on suspicion of driving on the TT course during a red flag incident in the sidecar qualifying session.
Officers say they take such offences 'extremely seriously'.
The Constabulary issued a stark warning that trespassing on closed roads puts lives at risk, even if there's been a break in racing.
Five IOM women recognised in King's Birthday Honours
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'Multitude of late boat arrivals' impacting customer numbers, says business
Technical issues on the ferry resulted in papers arriving late on the Island yesterday