[lambo911]

I spent a bit of time tracking down the water leaks getting into both rear corners of the boot and into the battery tray. It is a right pain removing the floor rails, trim, the polystyrene tray and the electronics to get to it but there is no easy way around it.

The water was coming in around the gromet for what might be a breather/vaccumn pipe, it is about 1 1/2 inch diameter and just below and to the right of the smaller gromets shown in the picture in post #4. If I sprayed water along the top of the bumper behind the wheel this was where it was coming through.

I think the water then gets so full in the well behind the wheel it then slops over into the battery tray.

I tried re-seating the gromet without much luck.

There is a blanking bung in the floor in both rear corners so I just removed these so any water can drain out in future.