latest diagnosis not good h/p fuel pump breaking up system contaminated with metal filings blocked and knackered all injectors, so need new pump/injectors/filters/complete fuel system including tank to be drained and cleaned out, and the tank is full up with ultimate diesel just my luck so expensive repair on the way, ah well it happens I guess but its such a nice car in great condition so I am getting it done wish it was not so near to xmas !! will let you guys know the outcome once all done .