More people travel to UK to watch football over the course of a season that will travel to Euro21 in UK, assumming it stays on current basis. An Irish journalist did a survey and for UK teams there were 15-20,000 season ticket holders based in Ireland. This wasn't counting across EU where reckoning was another 2,000. Adding in the people who go to odd match and reckoning that just between 500,000 to 750,000 of attendance of Uk Premiership games are from abroad across a season. This not taking into account Scottish premier league or lower leagues.