A very big thank you to Turvey for posting that link .
Those photos of the Volvo engine cover have made my day . I'd heard that there was a Volvo cover which fitted the Focus 1.6 Petrol but never saw one , thought it was urban legend stuff , I have suffered this same problem for too long myself not knowing for sure even now if it's the washer jets or core plugs (new coil + leads , set of spark plugs , upgraded jets and 3 pairs of core plugs later) so I've just added one to my shopping list to eliminate at least one of the possible causes .
Yeah Ford , good sales slogan of the time these cars were made ..........
"It maybe your car but it's still our baby" (until the recalls start 'flooding' in !)