Got spark, not turning over

Hello! Van (1300 efi) been standing for a while. It won't start for me. There is a spark on the top plug. No smell of petrol at all (there is petrol in it!) when trying to start, depressing accelerator etc. Any help appreciated. Thanks

Do you hear the fuel pump prime when you turn the ignition on?

Checked, thanks, couldn't hear it, been under the van and found a terminal eroded. That might be it!

Thanks for your help