According to airport-data.com it's owned by a Portugese company, seems like it has been leased for the occasion - its latest flight went from Farnborough to Oxford last week.
I guess this is the plane we should keep our eyes on:
https://www.flightradar24.com/JME515U/2968cf1a
(Bombardier with registration CS-REU) Destination not specified though.
EDITED TO ADD: Link has been changed to https://www.flightradar24.com/CSREU/2968cf1a if the former link doesn't work)
Yeah, but I thought I would clarify the confusion - the thing is that the whole Inter team got vaccinated on May 31st, all players EXCEPT Eriksen who already attended boot camp in Denmark that day.
Director for the Danish FA states that the players were able to talk to Eriksen after he was taken to hospital, so that may have played a part in their decision to continue.
People in the stadium are being told there will be an update at 20.45 CET on whether the game will be continued, rescheduled or cancelled. (Edit: Another user beat me to it)
He's getting stretched off now - Danish TV cut away to a panorama view shortly after it happened. Luckily for him the stadion is right next to a large hospital.