When I tried to order my tickets for next year's 24 hour race in the normal way at the ACO this year I was told to wait until 1st September when the tickets would be available fo sale online.
Well, I gave it a go at 00:01 today but I am not surprised to report that I cannot find anywhere on the ACO's website that will allow me to order tickets. It has not changed during the day either.
I have e-mailed the tieket office asking for clarification and will let you know in due course, if I get a reply.