Smelly boot/trunk

[mylesdw]

I am currently going over my car trying to sort out some of the stuff I didn't get right first time around and one of these issues is that the boot/trunk has always smelled of petrol. I have the filler neck, tank, electric pump, filter, pressure regulator and pipework all in there. There are no visible weeps or leaks but I wonder whether I am attempting the impossible and some of these components just aren't meant to be mounted in an enclosed space. Should I consider moving things like the pump out of the boot and into the space under the car behind the rear axle, or maybe making a vented compartment that is sealed from the rest of the boot?

Any thoughts would be much appreciated.