Thanks, Aero.
Intercom! I hadn't thought of that. In my mind it's a solo kind of thing. I guess I should begin to consider my better half, lol.
You can also listen to iPod's, etc, or plug in the satnav! It's a Morgan fitted extra and it made sense to have it fitted ab initio imho!
I'll measure the wheel and let you know the size, but not tonight as I'm off to bed now...