My son went with City to Germany 2015 aged 16/17 on his own. Flew from Mcr to Copenhagen & on to Germany. As match kicks off I get a call from Newcastle (?) airport -they had his passport?? He’d left it on the Copenhagen plane that had then flew to Newcastle - cleaner found it ffs.
We managed to get him home without a passport - i found out that the Airline just had to be happy to take him without . Although I had photocopied his passport &he had that with him - may have helped.
Just wondered if you’ve asked the airline if they will take u without -you can argue with Irish immigration when you get home if needed.
Most countries are happy to let you out!