OK, update time.
So last night I took off the battery covers and scuttle panel at the foot of the windscreen to check the grommets and see if anything looked like it was letting water in. There’s a large circular rubber seal/grommet that sits horizontally directly below the scuttle panel, which I think a couple have referred to. This looked favourite for the source of the leak and has been mentioned on a few different threads when searching for solutions. This looked fine though – still intact and seated correctly. None-the-less I gave everywhere a closer look and a clean (although it wasn’t particularly dirty) and replaced the scuttle panel and covers.
Then moved to the door seals, concentrating mainly around the area near the mirror and door hinges, but also looking all around, making sure it was sitting correctly. I pulled all the necessary trim off and the seals and refitted them, just to be sure.
So, everything removed, cleaned, examined and refitted, I shut the door, grabbed the hose and gave the door and front quarter a good soak. Gave the water time to drain and opened the door. Nothing. Not a drop
Shut the door again and gave the same area another good soak. Opened the door, still dry Looks like by removing and refitting everything, somewhere along the line has sorted the flood. Chuffed.
Before putting everything away (but still leaving the carpet pulled up to dry and the seat out), I thought, just to be 100% certain I’d solved the issue, I’d give the whole car a good soak all over, so grabbed the hose again.
Let the water drain off and opened the door. This is what I found. [insert same expletive used in the first post].
The water is running from the rear of the car, under the main central bulk head, through the gap you can see, under to second cross member below the seat and then collecting in the footwell. The water is running this way as my car is parked on the drive, with the back higher than the front.
So, positives: The water isn’t coming from the windscreen or door areas.
Now looks like I’ll be pulling the rear end of my car apart though to check seals etc and I won’t get chance now until next week.
Oh another positive, the floorpan below my passenger seat and the passenger footwell is now very clean due to the amount of mopping up taking place.