VRS TFSI 380bhp P0087 Fuel Cut

Hi chaps

I've just taken ownership of a 2006 TFSI vrs which is running 380bhp and has an issue with fuel cuts under load (logs p0087 Low pressure).

It's on a K04 hybrid turbo with a custom live map done by map tech lincolnshire.

The hpfp is a brand new uprated APR unit, the cam follower is brand new and the camshaft is lovely and smooth (car has done 83k).

The low pressure tank pump shows under 50% duty at idle in VCDS.

Where do I start?

Cheers