CTT have allocated your timekeepers, and they should have all the kit you need. Failing that, Jann has a pair of stopwatches, which we should be able to get to you.
i looked into Traffic Management for signage earlier this year, and the requirements haven't changed from last year.
We will need hi vis vests or jackets for the marshalls. Again, there should be a stock of those at the clubhouse.
A human sacrifice is often necessary to ensure ideal conditions, but that's optional, and tends to get a poor response from the media.