I have seen other answers about water coming in through seals, but I don't that that is it. It seems to be coming from the back corner of the boot floor, seeping in through the weld? I am loathe to get a welder in if there is a simpler solution (other than put underseal over it to stop and hide it), and I might be looking in the wrong place.

Nigel S, January 2010

remove the rear light units & check the seal around them, as for it leaking through the seams, then seam sealer would be more effective..

sam, January 2010