Hi Thanks for your response, I'm not sure how the mechanic primed it, We did try tow starting it etc and with my messing around with the pipes to the injectors fuel does come out if one is left loose and its cranked over so i sort of ruled out it being a priming issue? I also thought the glow plug light would show if fuel pressure issue,
I'm only a relatively competent DIYer and have only got some generic software that seems to suggest it can do live data, I'll have to try and see if it will show fuel pressure.
I think maybe i do need to double check the timing, although would that stop the injectors from firing fuel completely? I know it may not run but is the ecu clever enough to compare between the crank sensor and the cam sensor and stop fuelling if these are too far out, ultimately it ran with the timing out before, maybe only a few teeth, hence causing the damage ( had a look at a youtube clip so i understand how the injector works and that i would be able to see the fuel being squirted).

similarly from both your comments clearly i need to somehow check the fuel pressure

Thanks Miles