Football fans have warned that plans to exclude supporters who are not fully vaccinated against coronavirus from attending Premier League matches from October could cause "chaos" at some clubs.
Chairman of the Football Supporters' Association Malcolm Clarke warned the proposal being considered by the Government to make vaccine passports mandatory for events with more than 20,000 attendees will need to be "managed very carefully".
Prime Minister Boris Johnson was also facing further criticism from backbench Conservatives who were already opposed to plans to introduce their use for entry into nightclubs this autumn.
But Mr Johnson would face a battle to get legislation mandating their use through the Commons, with many backbench Tories also vehemently against them.
On Sunday, senior Conservative Tom Tugendhat, the chair of the Foreign Affairs committee who has so far been supporting of coronavirus laws, said: "Vaccine passports risk a social credit system of control.
"If we need a vaccine for events like a party conference or a nightclub – why not to travel by a train, or go to a university lecture or a shop? What other choices will result in denial of service?"
Chief scientific adviser Sir Patrick Vallance has warned nightclubs have the potential to cause "super-spreading events", but it is unclear to what extent what role football matches have in spreading Covid-19.
There were concerns, however, around fans travelling to London during Euro 2020 after Public Health Scotland figures showed there were nearly 1,300 Covid-19 cases linked to fans at events as Scotland faced England in the group stages.
That included 397 people who attended the clash in Wembley on June 18, according to the official figures.