I've been having a wet drivers footwell now. Had the wipers, wiper motor and scuttle panel off and loads of cracks in the seam sealant were found. All dug out and re-sealed. Then it still leaked. A new crack found that wasn't there the first time. Sealed that. Now it seems ok but still a bit wet. Not sure if it just normal damp / sweating or its still leaking.
Passenger side was the same, seam sealant cracks.
Boot … no idea where but sealed the light holes and all the seams in that area and the boot hinge pockets. Been dry but a but paranoid that if I clean it, I will disturb it and it will leak again.