On Saturday (23 April) I ran the Uxbridge - Run for the Diamond. I should have been able to run sub 23min, even in the cold, damp conditions. But I was more than 3min off that pace, finishing a disappointing (for me) 33rd. Here's a photo showing the strain on my face. I went through the first 2k on pace (4.5min/km), but then just before 3k started to cramp.
Incidently, it was a well organizied race... around 1000 people in total for the various events - great job!
I went for an easy run today (Monday) - just under 8.5k & it was a faster pace than the weekend 5k.
I think I need to start running in the morning, to get my body used to morning races (since that's when the majority of races are.