On a vaguely peripheral topic, what happens if you have a UK issued JAA PPL and you have been revalidating it every 2 years (with an instructor or with an examiner) as usual but have not (probably not ever, for 10 years) sent the 5-yearly payment to the CAA?
Obviously the license is invalid, but can that be fixed by paying up?
Let's assume one has another country's CPL/IR and is flying on that, so nothing illegal is going on.
I reckon this goes on a lot because the CAA does not send out reminders, and a 5 year cycle is a long time to keep track of.