The accident occurred at Casey’s, just after the 28th mile of the course, on the 3rd lap of the race.

Adam Lyon, who earlier said it was his “dream” to race in the TT was a newcomer to the TT this year . He qualified in 24th place for today’s race with a fastest lap of 122.261 which he improved to 122.636mph on the opening lap of today’s race. His fastest lap of the TT course – 123.443 – was in Friday’s Superbike qualifying session.

Adam lapped at 122.499 as a newcomer at the Ulster Grand Prix in 2017, finishing 11thin the second Supersport race. He finished sixth in the 2010 Pirelli National Superstock 600 Championship with podiums at Croft and Silverstone.

The 26-year-old, of Helensburgh, Argyll, is the second rider to be killed during this year’s event

Manx racer Dan Kneen, 30, was killed in a crash during Superbike qualifying on Wednesday.

Rider Steve Mercer was also badly injured and remains in a “stable” condition following a collision with a car on the Mountain Course.