I pretty much followed the Greenbank sartorial approach until Villaines in the way back, although my arms covered in dew cycling through the mist on the way into Brest got me pretty chilled. This was because in my pre-ride frenzy to reduce weight being carried I mistakenly ditched the arm warmers.
I eventually realised I could have bought replacement arm warmers at one of the controls and did so at Villaines, so wore them the final night.