After developing an indoor water feature in the passengers side footwell last week, and lots of searching on here. I removed the scuttle panel, pollen filter and pollen filter housing.
I noticed one of the nuts holding the pollen filter housing was missing, don't suppose anyone has a spare??

I cleaned out the all the leaves and dirt from the drain. I poured some water down by the bulkhead and it all ran out through the wing so looks promising.
I will keep an eye on it next week, as it looks like it's gonna rain all week.
cheers
thebassman