I finally got round to doing this today, really straight forward thanks to Rich’s video.
Definitely they seals as when I took the door panel off the rubber started falling out onto the drive in a crumbling mess!
Sadly it looked like whoever took the drivers door card off last time was very heavy handed, snapped holders all along the bottom that a bodged repair had been done.
I’ve done my best to get them tight but not convinced it’s the best of jobs, how critical is the tight seal on the fasteners, am I just looking at another leak if the clips aren’t tight in