Petrol Leak! Ughhh!

Hi guys,

I took the car out for another 150 mile motorway trip, on return I popped into local Shell to fill up. Turning the engine off, I heard some weird noises, like spitting etc I noticed the temp gauge was normal. Anyway, that lasted for like 30 secs, I immediately put up the bonnet up but nothing was obvious, no steam etc. Anyway, I proceeded to fill up and went home to nap.

Today, I got into the car and put the windows down because it was hot and I could smell petrol. I drove for about 5 mins and came back to notice there was a patch of petrol probably the size of a dinner plate on the drive way. I don't think a lot leaked out because the gauge was still above full.

Anyway, got under the car to have a rudimental check, noticed the previous owner put a new fuel pump in so it cant be that. Umm..there isn't any obvious fuel leak source I can find. But the tank itself does look quite pitted and rusty on one side.

Question is: Have I written this motor off? how expensive is it to replace the tank (assuming that's at fault)

and if its fuel lines, can it be fixed near the region? OR does the whole lot need to be replaced?

How expensive is all this?

I hope its a cheap hose or something.

Thanks