Exige S1 cutting out - fuel pump or wiring/mfru?

[S1ufo]

Hi there, I've been experiencing more and more issues with my S1 Exige cutting out recently. When turning on the ignition the fuel pump doesn't always prime. I've had a flick through the forum and seems this is a common fault. Where is the best place to start checking wiring? Will of course double check the MFRU too - this is behind the seats, right?

Thanks for any advise...