A little job breaks out into a big number
I went to swap my seats over and, on leabing in, noticed the carpet was wet. Great.
So......

LOLs
Least I found the leak now though. An old bolt hole under the batter tray. A quick 13mm nut in there solves the problem for now, but will need to whip it out and seal it up properly when its dry again.
Ah well, I get to wet vac the carpet now and will have to hang out the sound deadening to dry as it was sodden