A classic fault which I have had causing that drip is if the fuel inlet and outlet pipe stubs on top of the fuel pump crack due to stress caused by the stiff plastic fuel pipes, so the car still runs but fuel is being forced out of the cracks and over the top of the tank, dripping out where it can.
Remove the rear seat and the triangular cover plate to expose the fuel pump, start up and you will see it happening before your eyes. I cured mine with short lengths of 6mm copper tubing gently rubbed down to push inside these stubs with some 24hr Araldite or similar, when dry poke through to ensure fuel will pass in quantity and refit. My repair has lasted 20 years.