Thanks Jono, I don't think I could start out at 1:45 pace though, I imagine I would burn out too quickly.
I've put together a mix for myself on my music, with the tracks edited down to lengths between 5:00 and 5:30 and arranged in the intended 1km times... hopefully that will guide me...
I'm in Pen H at the start, probably because I put in a slower time when I registered than what I'm aiming for now. Is it easy enough to get into another area at the start?
(running definitely the new bike polo then)