The BBC weather this morning said 79 degrees for Edinburgh at the weekend. Have checked various sites and the average seems to be around 75.

Mark says it always rains in Edinburgh, despite what the weather forecasts say. I bloody hope he's right. I feel absolutely terrified of running in the heat after Saturday's run. I could barely manage 8 miles.

I emailed the organisers this morning to plead with them to ensure they provide enough water. Apparently they have run out of water before, which is ridiculous as well as dangerous. Just got an automated response saying to direct all enquiries to the help desk when I go to pick up my race number on Friday. Great.

I really want to enjoy the day ... but I feel really nervous about this. I need to go outside and do a raindance.