[Karl]

Thanks Bernie.

I've done that and all is as it should be (battery reads just under 12v, alternator give out around 13.5)

I feel I might be worrying unecessarily as the car is currently up on ramps in the garage so I can't run the engine for long without a gas mask.

I suspect if I charge up the battery from the mains and give it another go I might get the thing to go out completely.

Cheers

Karl