I've now had the watering can and hose on the car and it seems to be coming from the wheel arch which has a mastic covering on it. The water is coming through the cuts in the mastic cover via a few pin holes. There seems to be a scuttle drain about 2 inches square and this appears to be clear - there is no flap on it though. Although I could seal inside the footwell I'm a bit worried that the water will sit behind this mastic covering and rot it. Any Thoughts welcomed Cheers John