I have had enough of the smell of petrol fumes from the boot. I have replaced the tank 2" filler pipe,and sender unit gasket with a viton seal.  I have narrowed down the source of the smell to the R6 rated old rubber piping in the boot which goes to & from the fuel tank & fuel pump. I know that the increase in ethanol levels has caused problems with old rubber pipes,  and seen the threads discussing R14/PTFE reinforced pipes to minimise the permeability of fumes, but I'm not entirel