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It was an armoured zip-tie (a pair of these if I remember correctly) that needed bolt croppers to remove (or something more than just a knife).
WhyTF is someone taking a knife like that to a football game?
https://www.evertonfc.com/tickets/useful-information/ground-regulations
"
8) Fireworks, flares, smoke canisters, laser devices, air horns, knives, bottles, glass vessels, cans, poles, dangerous or hazardous items, and any articles that might be used as a weapon and/or compromise public safety are not permitted within the Stadium. Any person in possession of such items will be refused entry or ejected from the Stadium.
"
https://twitter.com/PeteK_AQ/status/1610349881314676736
aside from where you might stand on disrupting a football match with a non violent protest, someone pulled a knife out of their pocket to "deal with this".