The meet up before the race is the same place as last year here is a google map link to it. I think people will start meeting up from 8.30ish onwards depending on the wait at loo's and bag drop. It's just by the steps leading up to the war rooms.
google.co.uk/maps/place/Chu...
Looks like this is the place for the meet up afterwards. I think it's arranged so there is no specific time so no one feels under pressure while they are running, which makes sense to me.