Peter, Many thanks, Currently on hold to Bosch Tech help.What you suggest sounds to be a good line to follow. I can rig up a series of clear plastic hoses to an open container to check the spill flow from each injector. I am trying to get a detailed drawing of the components of an injector as I am trying to work out how the flow enters the injector and the spill leaves as the two are at considerable pressure difference. Armed with these details and the outcome of testing the spill lines I will undertake an injector strip down to see what can be found. I am doing as much as I can on my own outside and have to wait for my neighbours day off to do anything requiring extra hands, and outside this weather is an extra headachce. I have not been able to look at the exhaust whilst cranking as yet. Given up on Bosch call. Regards

Peter, Many thanks for your assistance. The final push to get the beast started came from a freshly charged battery plush some extra clout from jump leads. The cut off valve had, I believe, been stuck in the closed position since it folded with a cracked cylinder head last July. Eventually it opened, but and I am guessing, it has yet to fully open as there is a steady flow from the pump body banjo coupling to the spill line, hence the spill line leakage experienced. Next stop check inlet and exhaust valve settings, present for MOT and back on the road, one happy neighbour and his six children, leaving me to just put my tools away.