Hello,
Thank you for your replies.
My car is 2008 (58 new face lift shape) 2.0 diesel (143).
It has had a new fuel filter; I had this problem a few months ago, and it's been fine ever since until yesterday. The last time it happened it had a more in depth diagnostic but still no fault! Wondering if it could be fuel pressure sensor but would still expect a fault code .... 😩 Fuel pressure is 300 bar??