Chippenham Folk Festival have POSTPONED to May 28 - 31st 2021. I think we can call that a cancellation.

Oxford Folk Weekend 17-19th Apr have not posted anything re COVID-19 - with venues being closed we can assume no-one will turn up. But it would help to have clear indications.

A lot of festivals scheduled for June (that I list) have not posted cancellations (as of today).