Wagger I'm going to tackle it this, afternoon as I have a doctors appointment at 1pm and I don't want to see him stinking of petrol...
I'll take your advice and hook up a direct line to the battery but first I want to remove the Huco and take a look and also see if any petrol comes out of the fuel line. There's a joint by the chassis that should be low enough to be below the tank. If nothing comes out I'll disconnect at the tank and blow down the line? I'm not sure where the fuel line goes when it disappears out the boot, I assume clipped to the chassis rail?
If the Huco is duff I do have a new mechanical pump but not sure I still have the fittings and being imperial not something I can get at Halfords.
Iain