Hi Peter,
To prove the issue is a defunct fuel pump, simply remove it, put a piece of tube on the inlet; put it in a can of petrol, & work the lever by hand, & see if anything comes out.
If it doesn't, then you've solved your problem. If it does work, then look for a blocked fuel filter, or a blocked fuel line from the tank. I think you are nearly there !
To check the fuel line, remove petrol cap, and get someone to listen at the tank filler, while you blowing back down the line. Do not use compressed air. If there are any rubber sections in the fuel line, then these can break down inside & block completely, even if the line looks OK on the outside.
Good luck !
Cheers Banjo.