Travel plans for summer involve; DS (14) and DD (12) taking an international (2 hour) flight. As "unaccompanied minors" they will be looked after by cabin crew from us leaving them to friends picking them up. Their return flight will be with 2 same age friends, so same thing.
Also, DS and his friend (also 14) will be taking a 3 hour train journey within the UK. (They'll be waved off and collected from the platform at each end.)
The kids are all fine with this and are v excited about all the jet setting involved. My DM thinks they are too young, particularly for the train, and has set my worry mode off. AIBU to let them travel like this? I'm sure I was taking the train alone at 14 but DM denies all knowledge!