Thanks for the help!
Zulu Ferret: It's an 02 plate, so pre facelift. Were there big changes to screen? When i got that one done, they told me that they hated fitting screens in 147s because the glass was always too big!
Thinking about it, any water running down the glass would just run to the bottom of the glass and then fall of between the engine and the bulkhead, hopefully. So far it's not showing any signs of leaking water, although it hasn't really rained since then.
There's still a lot of creaking noises coming from it (possibly excessive cold recently?) and i wasn't too convinced by the rest of the job either so i'm still in half a mind to push for a refit.
The attached photo is one i took of the offside bottom corner of the glass after I took it back the first time - took me a while to work out where the extra wind noise was coming from!
Thought I'd add some comments to this, even though it's a couple of months old, to answer some of the earlier questions.
1) The thin rubber trim between the plastic panels and the lower section of the windscreen should be attached to the plastic panel.
2) The gap visible in the picture is present because the corner of the plastic trim nearest the A-pillar is not seated correctly. There is a little undercut which mates with the Trim on the A-Pillar. At the moment it is sitting over the trim and not underneath it - hence the gap between seal and windscreen.
Not sure entirely what the point of the thin rubber trim is because it certainly doesn't stop a lot of the road dirt and gunk building up at the base of the windscreen (under the plastic part).
I suppose it does help divert some of the run-off water away from the bulkhead and tidies up the gap and flush condition between screen and plastic panel. Probably also stops vibration and rattles.
My rubber trim on the driver's side has seperated from the plastic part. I;'ve re-glued it on temporarily but plan to replace both o/s and n/s plastic pieces tomorrow as they are fairly sun bleached at scratched.
Hope this helps anyone who might read this after searching for info on the problem.