Hi Dan, Thanks for the response. Couldn't get a reader quickly enough so got my local Ford garage to hook it up and they reported problems with the coil pack on No3 cylinder. They cleared the fault and reset the new plug gaps and took it for a test drive. Guy said it drove like new and the light has not come back on since, but if it does, they recommend a new coil which I can get for £25! Cheers, Steve. :)