On our 2007 model water was getting into the boot and onto the passenger seat. If this went unresolved then I can foresee it getting into the footwell.

There are a number of leaks on these MK2s. The light clusters is one. Another is the boot hinges. On ours it was getting in where the inner and outer panels are joined on the roof, underneath that black roof strip. So using a wide and long screwdriver. carefully prise the rubber strip up a good six inches from the tailgate end. It will be well glued down. Then you will see where the panels join and the mastic has deteriorated. I used some black gutter mastic in the join, which also served to stick the rubber strip back down again.

Edited by Xileno on 18/02/2021 at 12:57

No nothing at all coming in through the door sprayed it with a hose not even a drop coming through.

I've just had a long-standing water problem cured on my Pug 207SW, which has roof rails, which I suspected as a possible entry point. The water collected under the carpet in the nearside rear footwell. It turned out that the roof rails could not let in water as they were attached to bolts built into the roof. The culprit was apparently one of the grommets taking the electrical connection to the tailgate, which had been removed and replaced at some earlier date. So check those.