Many thanks for your very helpful replies. I had not considered a relay. Discovered 3 relays high under the dash. Of which the main Bosch one was not fully in place. Have push it fully home and hoping this could be an answer. So far with 3 successful starts it could be. Incidently only 1 relay on the bulkhead, not sure yet what role it plays but suspect it could be the radiator fan.I am planning a fuller look at the weekend including work on the earthing leads.
