Got a focus with a misfiring and stalling issue as described by the customer.

Codes were as follows:
P1180 Fuel Delivery System - Low- Permanent
P1181 Fuel Delivery System - High- Intermittent
P0087 Fuel rail System Pressure -Too Low- Permanent

I watched the graphical display of rail pressure whilst trying to rev engine up gently from idle to 4000rpm. As the engine starts to miss fuel pressure dips and cuts out completely when the engine stalls.
In most cases the engine will restart straight away with cycling the ignition but sometimes engine will not idle or rev out but leave it 10 mins will start again fine.
Max rail pressure recorded by scanner was 180000 kpa and carweb says max pressure should be 1600 bar or 160000 kpa.
I'm tending towards rail pressure sender but can't even see it, i think its behind the egr cooler.

Any help greatly appreciated