I don't like the sound of the switch getting knocked by something whilst in the boot.

What I'm thinking is a G.B.F.O fused permanent live from the battery to the spare wheel well, where a second relay will be located. The original fuel pump feed will provide the coil current for this relay. A new earth will run from the pump back to somewhere undecided. This skins the following cats:

1) I still have the inertia switch
2) All of the wiring to and from the pump is brand new

I'm not being an awkward bastard, honest!

The wiring inside the car looks fine, but that underneath feels a tad brittle.

I'll be honest and say that I haven't actually GOT a known problem at the pump, I just want to ensure that the wiring will supply enough current to the pump so that it can cope with my soon-to-be incresead boost and fuel pressure on boost

Neil.

PS: Cheers for the input BTW - it's good to hear advice supported by real-life experience