“At Thatcher’s behest, the Football Association suspended English clubs from European competition for a year. European governing body UEFA went further still, announcing a five-year ban on English clubs and an indefinite suspension for Liverpool that would last until 1991. An inquiry into what had happened at Bradford and Heysel — as well as a riot at Birmingham City’s St Andrews stadium in which a 15-year-old boy died — led by leading judge Oliver Popplewell resulted in new, wide-ranging public order powers for police. Recorded incidents of hooliganism sloped off, while attendances in the English Football League the following season slumped to a post-war low of 16.5 million.”
I’ve written a piece for AFP on the Heysel stadium disaster and the role it played in the eradication of mass hooliganism in English football. You can read it here.