Well, that was a good dose of healthy exercise.
The transitions went like a dream, I finished the 400 swim wishing that it was longer. The bike leg wasn't a lonely as I'd expected, and had some time trial style racing. Ran like a duck though. Having said that, nobody ran past me, and I took 4 mins out of the guy I had been chasing on the bike.
The instant results machine said that I was 7th, but then again, most of the others hadn't started at that point, and they were the fast ones.
My next race is in 2 weeks time, with a longer swim.