Posting for reference for others, saw one other post which looked similar.
My windscreen developed a medium sized leak, was greeted to a puddle on the passenger floor after 12h of heavy rain. It seemed to originate from the A-pillar
After removing trim, I could look into the windscreen mount and splash water on the windshield, and see where it drips. Bingo
I then started with drying it out
Applied lots of clear silicone, let's see if it holds. If not, the windscreen needs to be resealed. Fingers crossed for an easy fix
Anyone else had a similar issue?