The fuel reg is this part (Not my car btw):
The noise doesn't seem to be coming from here, more like under the plenum? Would this be where you'd expect the noise to be if it was the fuel reg?
Thanks for you help guys, really appreciate it as always! I'm going to Abbey in a few weeks, so I'll see if they can look at it unless someone thinks this is life threatening? I assume if it's the fuel reg, that it's not an urgent fix?