Yes, Aldermog, I'll investigate the Williams' wind deflector with Paul. I'm not sure I like the curvy look, but if it gets Jan in the car with the roof down, it'll be worth every penny.
Thanks, all, for comments on the mirror. I've clicked it round a bit, and almost got it to a reasonable position, but I think I'll go for some of the round ones I've found on line.
By the way, in my previous post, I don't actually use 'tongue' to blast past cars - the autocorrect clearly didn't recognise 'torque' as a word!
It's taken a while to get used to the Roadster after the Caterham, but driving back from Bath to home at 10.30pm the other night, roof down, tonneau half on, heater on full blast and heated seats warming the nether regions, was ...... wonderful!