Disco 2 Disco 2 td5 cranks but wont start.

Hiya I have a 05 disco 2 td5 auto.

How it started was driving then it just completely shut off no stuttering or any signs it was going to shut off before it did and it's not started since.

It's had new fuel pump got a new pressure regulator to put on but I'm not sure that's the issue as there is no leaking of fuel or anything. Ecu is fine ect it's just not starting and it's got me baffled and also have a couple landy specialist baffled as no codes come up on the nanocom ether.

The fuel pump primes ect and you can hear it but it's like there isn't enough fuel getting into the engine so it won't start im at a complete loss.

Did they check the battery? As, believe it or not, that can be the problem, even if it still cranks.