Tim

I've just had exactly the same problem, rear drivers side footwell like a paddling pool. After lifting the lower section of door seal and removing the plastic trim two white plastic elbows are visible and two of those four joints were leaking. I stripped some copper cable 1mm or 1.5mm will do, take a piece about 5cm long turn around joint and twist up, ( like a hose clip ) snip off excess, don't twist too tight or wire will snap, I done all four while I was there works a treat, when refitting make sure sharp ends are not in contact with wiring loom, bend them over or tape up.