Hi all (please read last para first|)

I'm a newbie here and also to LR so apologies if my question is already answered or common knowledge.

My TD6 Disco 2019 has a wet patch on the passenger side floor. I've removed the cill cover and body/chassis/whatever below that was filled with water as well which I've mopped out. The door speaker (the lower part not the tweeter) approx 10" from the floor also appears wet as well.

Any ideas please as to where this might be coming from?

I was to post this and the heavens absolutely emptied...proper big rain. I sat back in the vehicle and I could see water entering front and right of the door where inner seal meets the bonnet release lever. I removed and reseated the seal, shut the door and the water stopped. Any tips please to stop this happening again? The seal didn't look displaced, I just pulled it off, pushed it back on and shut the door which seemed to do the trick.

Thanks in advance