"not everyone is confident to travel alone especially in london where public transport can be very confusing"
Many years ago I had a placement student from the local university (with the stress on the word local) working for me for six months. He actually went to HR to complain that it was unreasonable to be asked to visit customers in London because he "wasn't from London" and "didn't use trains". It transpired that he had never, in fact, used a train because his parents drove him everywhere. There were pool cars available (oh, the joys of working for a company that also ran a fleet) but he couldn't drive. He was, what, 19, 20?
He was a nice guy, if a bit naive, and actually pretty competent. It was fairly obvious his parents had done him no favours on this as in other areas, and that they themselves virtually never left their own postcode. So for a few months we took him along with us to meetings in London even if it wasn't strictly necessary, and booked the extra travel to the training budget (including buying him a 16-25 railcard). After that he was OK, so far as I could tell, and even went on a one week course in London.
The punchline, such as it is, came some months later, when I had a long train journey somewhere with someone from HR. "Do you remember that trainee who...?", she said. It turned out that not merely had he complained to HR, but after we started taking him places on the train and expecting him to stay in hotels there had been a succession of phone calls from his parents, first his mother (weeping) then his father (yelling) then his brother, by implication older, (threatening) about the risks we were forcing him to take, how his family were worried sick all day, how they couldn't cope, etc.
Poor bloke. At the time I assumed his parents were ludicrous outliers, but now I have children of a similar age, I can see several of their contemporaries doing the same things: children that can't use trains, can't handle large cities, are driven everywhere, have to phone/text at every turn, etc, etc. They fuck you up, your mum and dad.