Quite some years ago, in '99, a fixie rider appeared at the Willesden Battle Van in Loudéac. He had broken a drop out and was driven to the control by the organisers. There was a bike, belonging to Yvonne, in the battle van which had the right size. So he borrowed it and was brought back to the original point by the organisers. When he passed Loudéac again we tweaked the bike a bit and he finished on it. Later on I heard that the control staff checked with Paris and this bike swap was officially accepted.