My 94 disco gets water in the footwell .Found out its coming from a hole in the inner wing[common rot spot]Lift the bonnet and you will see a catch tray that runs in front of the windscreen.At the sides are drainage holes that take water into inner wing.I had to pull trim of in front of n/s door ,lie on my back and shine a torch up above the handle for bonnet release.Thats where the hole is.Tried to bung it up with filler foam it seemed to work but water now getting through a seam above it.Anyway its on the wifes side so she'll have to wear her wellies.