James Cornell, the passenger of the American sidecar crew, who crashed during Saturday night's practice session at May Hill, Ramsey has sustained multiple fractures. His condition is described as "critical".
The driver, Doug Dano is "comfortable" in Nobles Hospital.
A Travelling Marshal slid off his machine at Brandish after hitting a patch of oil. Keith Trubshaw is said to be "serious but stable" in hospital.
Solo rider Jeff Jones has been discharged after an incident at Quarterbridge.
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