Thanks Ed for the info, surely though if they are showing like the other day "Lack of adhesion at 32nd Milestone" at the startline on the big LED board just before the race start they know what the reason is ?.  I'm not thinking a notice/info board for marshals to hold i'm thinking it would be quite simple for the organisers to have a defined separate flag for lack of adhesion from rain shower. FYI this isn't me arguing with marshals or the job they do(you/they helped me lots of times back in the day) just looking for info.