discovery 2 td5 starting problems

I have the problem that many have tackled on this forum - difficulty to start after a few hours of non use.
originally thought it was the fuel pump as it made a whining sound once the turned on, changed that but same problem, changed the fuel filter and finally the air bleed valve on the filter housing, still no different.
The fuel pipe non return valve was my next option but on removing the connecter from the filter housing there does not seem to be one on this vehicle ( 2002 model ). there is no rise in the engine oil level and the fuel regulator was changed 6 months ago due to leaking. any further ideas ?

Welcome to the forum.

Ask tech questions int disco section where more disco owners will see it. This section is fer introductions only.

injector washer and o rings.

Cheers

Hello, i'm new here.
Bought a land rover discovery II td5 GS made in1999 just over a week ago, picked it up in devon (where I come from) on Saturday and drove her through france (where I live).
I'll post in the disco section as after alarm probs today and a EKA code attempt she now won't start.
Thanks

Welcome to the forum