So, just back from the 10k. Came in at just under 43 minutes. Don't know the official time, but I stopped my Garmin at 43:02 (having forgotten to stop it for a few seconds at the finish). I'm happy enough with that but think I could have ran the second half a bit more aggressively - I was just too worried about burning myself out too early I think. The conditions weren't great either - just as I was picking up the pace on mile 5 on a nice downhill, I came round a corner onto the flat to be met with a strong headwind, ruining the momentum I'd picked up on the hill.
Splits according to my Garmin: 6:40, 6:48, 7:04, 6:56, 7:00, 6:53, 1:39.
I was really holding back on the first mile, and still ran it a bit quicker than intended - that's probably the reason for the 7:04 on mile 3 (there was a 96 feet elevation gain and it was into the wind as well!). I did notice loads of people going flying off ahead of me that I overtook by about mile 3 or 4.
Overall I felt strong throughout though and definitely think on a better day / with more confidence, I could have been closer to 42, but it's still a decent PB in less than ideal conditions!
Thanks for the training and race day tips on this thread!
Now eagerly waiting for the official times and to see where I placed out of the 900 runners. I gave myself an aim of top 50, I might be just outside that, there seemed to be a decent amount of folk ahead of me for most of the race.