Where can I find out what a Level 4 French exam entails?
If you have a UK FRTOL then you were automatically granted Level 4 by the CAA several years ago, they issued all pilots with a new licence. You must have revalidated your licence since then, and the Examiner would have signed you up for level 6 if you are Fluent or a native English speaker. Certainly the Examiner should have made you aware if this was not on your licence
Can anyone advise whether we need a "certificate of profficiency in English" to fly in French airspace?
If you intend to use the radio in any Country other than that of licence issue, this has been an ICAO requirement for the last 4 years!