Relay 2019 2.0 HDI P0093 Advice

[beggers]

Hi everyone,

Recently bought myself a 2019 Relay 2.0 HDI 130 to convert myself to a camper.
It has 182k miles and was fleet owned but pretty straight/clean with good service record.
I've done about 500 miles in it since I picked it up and about 250 miles since owning P0087 and P0093 codes for fuel pressure low/leak codes have come on.

Changed fuel filter and cleared codes all seemed ok for another 200 miles and now P0093 has come on again but by its self this time.

No black smoke, no limp mode, feels like still powerful (was towing with it at weekend). No obvious visible leaks from any pipes to/from filter or injectors.

Any ideas on what to check/try next? I was thinking leak off test but no black smoke in any scenario visible?

Thanks in advance!

[beggers]

I've noticed slight increase in engine oil over 500miles on reflection so I've ordered a leak off test. Will share results once completed in case anyone else has similar in the future.