TD5 90 fuel problems. help needed..

Hi guys. New to the site. not had my 2001 landrover defender td5 90 long and its already broke down on my.

Suspect the injectors not getting fuel. I can hear the electric fuel pump going. removed fuel inlet from pressure regulator. Found fuel coming out but not fast. I that right? Suspect fuel filter might be blocked. Replaced filter. Engine will still not start.

I think the pump is ok as when the filter is off and the pump is turned on diesel ****es out offilter head.

Any ideas of what to do next will be greatly appreciated.

Thanks franky..