The spokesperson added during the livestream, a warning was issued on screen about the very strong and discriminatory language.

Police are reviewing videos of comments made by punk duo Bob Vylan during their Glastonbury performance. Source: PA / Yui Mok

Meanwhile, Kneecap, who are vocal critics of Israel’s military action in Gaza, during their performance criticised Israel — accusing it of genocide, an allegation denied by Israel’s government.

The Irish-language band have been in the headlines after rapper Liam Óg Ó hAnnaidh, who performs under the name Mo Chara, was charged with a terrorism offence for allegedly displaying the flag of listed terrorist organisation Hezbollah at a gig last year.

Asked whether he regretted waving it, and other comments caught on camera, Chara told the Guardian in an interview published Friday: “Why should I regret it? It was a joke — we’re playing characters.”

“I think they have obviously gone a bit close to the mark sometimes but if you are an Irish person living in Ireland you’ve lived a hundred years of oppression in Northern Ireland, so why can’t you say what you feel is right?” another fan said.

Kneecap lead anti-Keir Starmer chant at Glastonbury

“The prime minister of your country, not mine, said he didn’t want us to play, so f*** Keir Starmer,” Chara told the crowd.