No surprise ... usual thing, driving along at 70 .. put foot down and flashing glow plug lamp and engine dies... onto the hard shoulder... This happened 6 times between london and birmingham.
So I tootle home at 50 google the problem and order myself a crankshaft and a camshaft sensor as I suspected these were the culprit.

when taking off the engine cover i noticed that the words going to the rail pressure sender on the LHS of the rail were damaged .. inside the protective sleeving!!!

i could see the engine cover had been chafing... so i repaired and sleeved ..

replaced both sensors and cleaned out the EGR while i was there...
Tried to start it.. and nothing... just spinning over ...

checked fuses .. all ok..

in frustration replaced old sensors .... still nothing.. I'm getting a bit miffed by now.. call a mechanic mate who comes with posh snap on and bluepoint analysers ... no fault codes... hmm

Put new sensors back in and checked all wiring ... tightened earths ...still nothing ..

next day decided to try old sensors again...

when i was removing the new crankshaft sensor i noticed that to has about 4,mm movement in and out of the location hole. because the bracket is slotted,

I put the old sensor in and pushed it in as far as it would go ..
car started first crank.,..!!!!!

I then out the new sensor in and did the same .. pushing it fully in..
Nothing,... would not start.

So it seems i had a faulty NEW crankshaft sensor and that the in / out positioning of the crankshaft position sensor is far more critical than i had seen highlighted on here. Hope this helps someone.... my car is noww smooth as silk.. I am just waiting for my first hot motorway run.. to finally check the problem has gone..