Thanks chaps,
My car's got a Ducellier, which has been checked by a specialist and is in good health, I've got a fresh battery and a new regulator from Omicron but for some reason I've still got charging issues. I suspect the new reg may be faulty but I've conceded defeat on this one due to lack of time not to mention my ineptitude with a multi meter and dropped it off at the local garage. Their electrician asked for a wiring diagram so he could sense check the various connections .
i think I mentioned a 2cv regulator available for peanuts is correct aftermarket part for the Ducillier. Also there is a small (green?) wire that goes onto a spade terminal at the back of the Ducillier which if not connected will give no charge output but the red light stays off.....