There was a brief account of a pioneering Calais-Brindisi in a very early edition of Arrivee. I might dig it out and scan it to pdf. It was actually ridden as Brindisi-Calais in a little over 8 days.
The 'Brindisi Seven' are/were:
Mark Brooking, Ray Craig, Peter Crump, Simon Doughty, Simon Jones, Mick Latimer, Jane Ramsdale.
They rode as 2 'teams' but reading between the lines individuals got lost and found at intervals along the way.
Great to read the Calais-Brindisi tradition being upheld.