From the man himself, looks like a punctured front tyre!

https://twitter.com/tweethutchy/status/8...4866558976

"Thanks to @manxathlete for the footage showing punctured deformed front tyre I didn't stand a chance same leg in a bad way I'm gutted 😩"

That's dreadful luck for Hutchy - both for for suffering a rare deflated front; & injuring the same leg which he was so fortunate to retain after that horrific incident at Silverstone. I sincerely hope he manages to recover as fully as he miraculously did before. If anybody can, Ian certainly can. My best wishes to a speedy recovery in the coming weeks & months.