Mamma66
My now sister-in-law and I traveled from Nottinghamshire by train, to London, stayed overnight in London, across London to the coast and then across the channel onto Belgium. and first to Bruxelles and on to Namur. We were both 15 and it was long before mobile phones. We were both considered sensible girls and to be honest I felt it was a really good experience for us. I do wonder if we wrap children and young people up too much in cotton wool these days.
I made similar journeys - and this was all before mobile phones, email, credit cards and all the other wonders of modern technology.
Of course, it depends on the child and to what extent they have been used to making their own way round in this country and also assumes they have been abroad in Europe on family holidays so that they have some familiarity with other countries and communicating with people who either do not speak English or do not speak it very well.
If the boy in question had never been outside the garden gate except to get into a car and be conveyed by a parent and brought back, yes, it would be very foolish to say 'Here is an Interrail ticket off you go.'
DGS, 14, and already 6 foot tall, and still growing has been going out on his own since he was 9. First walking to friends in the next road, at 11, walking 1.5 miles to and from school on busy roads and now free to travel round the city he lives in with friends and alone. He has visited France, where we had a holiday home until this year, regularly. I am sure by the time he reaches 16, he would be capable of Interrailing with a friend.