Well!! I did myself and my marathon sponsors well and truly proud.
My Garmin results (my GPS stopwatch) were that I completed it in 2:14:56, average pace 10.15min/mile, calories 1475. The gun time (when the race started to when I crossed the finish line) was 2.15.36.
I'm just waiting on my chip time - we wear an electronic timing chip that starts our own clock when we cross the start line - very helpful if you're a way back in the queue when the gun goes off, like I was. There were about 600 or so of us i think. All in all I'm very pleased with myself as I knocked approx 13 minutes off my half marathon personal best (PB) time.
Here's the details:
http://connect.garmin.com/activity/156855251
and here's the photo!
Still on course for a marathon in under 5 hours! 6 weeks to go!