https://www.thesun.co.uk/news/827384...pilot-licence/

...couple this with someone else's post about David Henderson being on the tarmac at Nantes just before take-off and wondering whether there was a switch of pilots at the last minute.

David Henderson was apparently much more experienced with this type of aircraft and may also have had a commercial licence. It was his name reported as the pilot in early reports of the missing flight.