l will be travelling from newcastle to imujidmen amsterdam in a weeks time

Last time l sailed with them it was 18 yrs old. Sailed with Thompson is a few weeks ago from newcastle and they too were 18 yrs old. Passport is your id with them!!
M

l take it from ur Q that u r under age?
legally, still 18 even though u r travelling outside the uk,
in real life though if u can pass for 18 & don,t act like a tosser u will be able to buy drinks from the bar.
if u r in a young group then go to the bar seperately & buy drinks in ones & two,s & meet up in a quiet corner.
alternatively get someone to go to duty free,s & drink in ur cabin
been there, done that & watched
tip.....don,t go to the small casino bar go to the main entertainment bar, its bigger & busier & staff won,t recognise u easily