Just a little update...
I said that when I assembled the doors I noticed that the driver's quarter-light popped the new rubber seal out of the frame every time I opened and shut the window, I know someone else on here had the same problem with the same side (Mikeyb?) with their new seal.
So I hope this helps anyone who also finds the same problem?
Whilst I tried sticking the rubber seal down with Evo-Stik it still tended to "ping" out, so I have investigated further.
I discovered that the glass withing the stainless surround had dropped a fraction. This is probably a combination of age and the glass only being supported on two sides, the driver's side of course being the most used so gets more action/wear.
You could clearly see the line of where the glass once originally sat, so I removed the glass from the frame, cleaned off any old adhesive from the glass and the channel within the frame, put a thin layer of Araldite on both surfaces, I then put the glass back in, hammered the frame around it using a wooden mallet (returning the glass to it's original position within the frame).
I have now bound it up with tape whilst the adhesive takes it's 24 hours to set.
Grand unveiling tomorrow afternoon to see if this has cured the problem of the pinging rubber.