Fitted a new bilge pump yesterday and was able to use the hull overboard hole as exit for the hose I used to pump out all45gals of diesel from the fuel tank. Once empty I could remove the leaking connector and was able to buy a suitable new fitting from St John's today. With six gals of diesel returned to the tank I'm pleased to report that there are no leaks so far!!
Photo of the new fuel tank outlet to follow.