Freelander 2 engine cutting out

Hi, I have a freelander 2 2.2 diesel 2009.
All was fine until it cam up "reduced engine power"
It cuts out at 3000rpm and wont restart until you remove key and re insert,
If you put the revs on gently it will go past 3000rpm,
I have had:
New fuel filter
New throttle body
New fuel rail sensors
And injectors tested,
My mechanic said next step is fuel pump,
Has anyone else experienced this.
Any info would be much appreciated.
Thanks

This is a duplicate of your post Freelander section.

That is itself a duplicate of one in the General Land Rover section, which is fair enough, but the new post is missing information from the previous one.