Finally it's happened! A colleague was going to fit the screen for me (ex-fitter) so I've hung about for ages waiting for him to get sorted. Sadly he never managed to, so I took it into Exeter for the screen fitting professionally.
Despite their best efforts they couldn't managed to get a trim rubber to fit so it's a straight glue finish, but at least it's flush with the screen surround now. They were really unhappy with the cosmetic effect of the silver heating contact strips top and bottom of the screen so have painted a mask onto the outside of the glass to hide them. It looks ok, but it isn't really what I'd hoped for and I don't hold out much hope for it being a long term solution.
It's a bit odd getting used to a screen with elements in it again (I used to have a Ford with a heated screen) and I'll hopefully get it hooked up to the power over the next few days.
The good news is that the car feels a good bit tighter, which probably goes to show how badly fitted the old screen was.
Rich