Mondeo Estate 2008 model.

Both front footwells are suffering water ingress. Very wet carpets, and I think it is coming from the door post area.

I have seen previous advice about blocked pollen filter, but they have moved it from the area in fron of the windscreen in 2008.

The windscreen is original, and I have been told the seals never leak. Main agents want £400 to remove the dashboard.

Anybody got any ideas on cause?