E70 35D Stall while driving crank no start

[Phil C]

My E70 11/2009 35d is giving me issues. The engine cut out while driving up my driveway yesterday and would not restart. It turns over OK and has not made any noises that I would expect if the timing chain had broken.

I have a Foxwell nt510 and checked for codes and got the following, unfortunately I haven't scanned this car before (relatively new purchase) so not sure which of these may be preexisting:
4252/present/glow plug cyl 5.
4262/present/ glow plug cyl 6.
3EC0/not present/DDE camshaft sensor signal
3EC1/not present/DDE camshaft sensor signal
41f2/present/DDE Electric fan activator

53fc/present/VTG Supply control unit terminal 30
54c6/present/VTG oil wear

D36A/not present/ no message (VTG, OXBC) receiver DSG transmitter VTG
5F3A/present/DSG Transfer case malfunction

I suspected a fuel supply issue so checked the fuses for the fuel system, checked the fuel system relay.
I listened for the LPFP running with ignition on but couldn't hear it, so I ran the pump using the Foxwell and confirmed I could hear the LPFP running.

Still following up on the fuel supply route I thought I would check the fuel rail pressure and found it was only showing 80bar. The unit is reading 8.7bar rising gradually to 80bar during cranking, required pressure 300-320 bar indicated. When I stop cranking it rapidly drops back to 8bar.

Thoughts/comments/suggestions?