matticus
Guru
I'm not sure what legal framework - or branch of Health and Safety - would consider this a "risk".But the risk in question is mainly one of getting caught for a short while behind a bunch of cyclists and being slowed down a bit.
So is the issue now resolved to your satisfaction? :-)So unless they have squared things legally the participants could be at risk of facing enormous fines (not exceeding ten of your English pounds).
I hope my input was helpful!