Saga continues. Another visit to Sous-prefecture this morning. (Sunny morning at last, good excuse to take the bike out) Was seen in the "Point Numerique" and helpful lady got me to log in on to the Ants website and then, I kid you not, the internet went down in the building! Helpful lady then phoned somebody (3400 number?) and they said my revision to the certificat was logged but there is a one month waiting list. Apparently there is one room where they deal with all the queries for all of France... Stay tuned folks!