neilp wrote ...
I found if I lift up the plastic cover away from the windscreen there is a long plastic clip runs the length of the middle 2/3 of the of the windscreen edge.
This clip attachs to the plastic cover and then slides onto the bottom edge of the windscreen. It holds the seal firm against the windscreen, I had never seen this clip before and it does appear to be doing the job.
Before using the clip
After using the clip
The clip is under the plastic cover, between the cover and the brake reservoir support panel
Update - Just to verify this clip is already under the plastic cover, not one I've added myself. All I've done is fasten it to the windscreen.
Neil