Not that £70.- buys a lot of petrol these days, but in the past if I glugged that much go juice into the tank then the gauge read somewhere past the half way mark. Now however that much money spent at the petrol station is only enough to get the needle just about quarter of the way to the mid point of the gauge. Ho hum. I guess the float in the tank is porous and past it. Fortunately I have a new old stock sender unit in its original packaging somewhere in my stash of spares. Unfortunately I will need to remove the old one from inside the tank, which I seem to recall involves petrol going everywhere, even after using the electric fuel pump to empty the tank. This job will have to wait until I can find somebody who is willing to let me use their car lift for an hour or two. I can't be messing about on the floor with jacks anymore. Good thing these cars have that excellent reserve feature, with which to monitor fuel level when the guage has ceased to function properly.