From the front of the school it's possible to see who's coming up the hill, as opposed to down it. The threat that someone might bob out to look might be sufficient, especially with a warning that anyone coming the wrong way would incur a significant time penalty. However, to be fair, all entrants would need to be told this clearly in the pre-race info. They'd also need to be advised to ignore the locals trying to send them left from the church steps; like others, I also had the experience of a helpful bystander shouting that I was going the wrong way when I headed to the right down the cobbles.

Thanks to all.

I was particularly glad that there was a last dram to squeeze out of the whisky bottle at Mankinholes!