I've not seen anything for this year's marathon, but last year's guide contained the following. I assume it will be similar this year.SIS are what’s used on the course as far as I’m aware but I’m not sure where and how often on the course they’re given out. See above.
Also, does anyone knows if the split times are put out on any website? I hope to arrange for someone to collect me at the end, and they will be able to estimate my finish time from the splits.
And does anyone know if there are safe places to leave valuables such as a phone, to be collected at the end of the race?