Thanks Will.
That sounds easier - I've never actually run a race before so the HRM seems a better idea.
The forums are brilliant - everyone is so supportive. Its really motivating, especially as I haven't run for 5 wks due to injury. I did 1.5 miles last night and thought my chest would explode!! Mind you, I didn't walk, and even though its only 1.5, I was only a minute slower than my best time. Having said that, the lack of any speed or tempo work may explain my crap best time anyway.
Cheers!