Sir Rod Stewart has cancelled a run of concerts in the US after having the flu, just weeks before his appearance at the Glastonbury festival later this month.

The 80-year-old singer said he was “devastated” to cancel or reschedule six shows in the US, due to take place over the next eight days.

The dates are part of what Stewart has described as his last “large-scale world tour”.

Stewart is due to play the coveted “legends” slot at the Pyramid stage at Glastonbury on Sunday 29 June. He last appeared at the festival when he headlined in 2002.

In a post on Instagram in the early hours of Saturday, he posted: “I have to cancel and reschedule my next six concerts in June as I continue to recover from the flu.

“So sorry my friends. I’m devastated and sincerely apologize for any inconvenience to my fans. I’ll be back on stage and will see you soon.”

Earlier this week, Stewart said he couldn’t perform at two concerts, including one at Caesars Palace in Las Vegas, due to the viral illness.

In his latest announcement three gigs at the venue were called off, including one that was rescheduled after a show was cancelled on Monday.

Two dates in California have been moved to mid-September.

Stewart has had a few health setbacks this year. He cancelled three concerts in January after having strep throat and Covid in the space of a few days, and after a concert in May he was seen with a sign around his neck reading: “Sorry. Cannot talk. Having vocal rest.”

Stewart recently announced his appearance at Glastonbury would be alongside his former Faces bandmate Ronnie Wood, who is better known for being a member of the the Rolling Stones.

He told That Peter Crouch Podcast he was only due to play for an hour and 15 minutes. “But I’ve asked them: ‘Please, another 15 minutes,’ because I play for over two hours every night and it’s nothing.”