Paul McCartney has said he doubts Glastonbury will go ahead as planned in 2021.
The former Beatle was supposed to headline the festival this year.
"100,000 people closely packed together with flags and no masks – you know, talk about super-spreader," McCartney told BBC Radio 4.
"I'd love it to, but I have a feeling it’s not going to."
Glastonbury co-organiser Emily Eavis told the BBC they are doing everything they can to allow it to go ahead next year.
She said: "The hard part is understanding exactly what we’ll be planning for, and what impact that will have on what we’re able to do.
"But right now I’m not sure there’s anything we could do that would completely ensure we can welcome 200,000 people to spend six days in some fields in June 2021."
She added that they are looking at other options should the festival not be able to go ahead in its usual form.