TD5 Poor starting from cold after a good run

Please Help! My 2004 TD5 Disco 2 has an ongoing issue where it needs a lot of turning over to start after it has had a long run on a previous day. It has been in a LR garage multiple times and so far the fault remains unchanged. To date the following have been replaced. Injector wiring loom, Complete fuel filter assembly, Complete Fuel pressure valve assembly and the fuel cooler. The garage tested the fuel pressure and said it was fine.
The Disco runs well once started and does start fine when warm or a day after short runs..
Any ideas of where I go from here as I am racking up garage bills!

changed a few not relevant things there,injector washers and crank sensor would have been my first port of call