Well that would still be covered by the one long vehicle rule

There is no such rule in law. A body of skaters is not a vehicle. You
are
merely following advice from the police on how to behave; presumably they
don't want to invest the effort in policing it properly. Anyway, a
pedestrian trying to cross the road is not aware of this "rule".

Well 'rule' as by following police instructions.

Whilst a pedestrian may not be aware of the rule, I think they would work
out not to cross when 600 skaters are streaming by. We do also say a big
thank you to anyone who lets us pass.

What happens at zebra crossings by the way?

If someone is crossing we will obviously stop. However the marshalls do a go
job of keeping the roads/crossings ahead clear so that situation hardly ever
arises.

but yes, the skate is insured. The t-shirts available on the
website and before the skate help fund the insurance.

Glad to hear it.

Gotta do these things properly.

G