Apologies if I've missed something obvious!
I've just been renewing a family passport, and looking at the form I started wondering about what you do with 15 year olds (a pretty common renewal point I'd have thought if you first go one when newborn).
Do you apply for child renewal, and it runs through to 20? Or do you have to apply for first adult passport at 16 or 18? And if so, what happens to the unexpired part of the child passport? (am I over-cynical in spotting the potential for a nice little earner on this?)
Or is there some other arrangement?