have any of your teenagers experienced problems getting through immigration when flying alone recently? I ask because my 16 year old dd got the 3rd degree when flying back through heathrow and was told she was not allowed to fly unaccompanied under 18 years of age. I can't believe this is true for a 16 or indeed 17 year old as it is totally ridiculous that they need to still travel as unaccompanied minors at that age! She's flying alone again in dec and I just want to make sure it goes smoothly this time. Although she had over a year left on her child passport we've applied for her first uk adult passport to see if this makes a difference. Do any of you find it's necessary to send anything else with your solo travelling 16 or 17 year olds? Many thanks