Well, I spotted CET and Phil W on the Scottish Ride last weekend, both of whom I'd never met before.
I was wearing an Audax Ecosse top all the way round ( indeed, the *only* AE top I saw, which surprised me a wee bit ).
But in the cooler watches of the night I deployed my Spare Jersey and gillet, which were red YACF ones on account of them being big enough to wear over a normal jersey.