Will try to read fuel pressure tomorrow but my feeling is no fuel is making it from the pump. It tries to start with easy start but can hear a good amount of knock going on which adds up if it's running lean with little or no diesel.

Thanks for the reply will try to pull the live data tomorrow and post back

The glow plug light has two functions one for the the glow plugs and the other a purely generic warning telling you their is a fault in the turbo,actuator,EGR or exhaust system etc.Ifyou read the manual it does tell you.

If you are using a basic OBD11 then the glowplug fault good be anything on some models this is also throws up a generic fault code.A glowplug to work acts the same as heater one end of the heating coil is +12v and the other is earth so be very careful deciding one or more are US.

Forget the glow plug system,this will not cause a non start.You need at least 150 bar fuel pressure for these to fire up ,you have only 2,so no where close.Either there is insufficient fuel input,or there is insufficent restriction on the output side of the pump to the injector rail for the pump to build any pressure.Could be an injector fault.Pull off the spill return pipes and check for excess fuel return.There is no need to bleed a common rail diesel system,if you crack open a pipe ,then pressure is lost and this defeats the object of the game.It is possibly a pump problem,but you would need a system pressure test kit to analyse pump output.About £800 will buy one of these.