I don't claim to have superior knowledge Nick, I hope I am not seen that way.
Not at all Alistair, I enjoy our conversations and always like to hear and learn from others.
I am sure I have made errors and omissions as well.

In fact I have just found an error I made!
I bought some old magazines from when the Aero was first released over Christmas, reading through I found one of the very first early press/production cars (wearing V8 MMC at the time) had... 3 wipers on a Series 1!
Interestingly the same magazine reviewed the Aero a few months later with a proper review rather than a first-look, and the same car/reg (or very very similar spec as the paint looks a different shade) had 2 wipers. So there may well be some 3 wiper Series 1's out there.
Everyday is a school day

Just need to find some GTN reviews/literature now..