I've somehow been recruited into a mate's team for the London event after his colleagues had to pull out.

Have you done one before? Any tips? Things I'm wondering at the moment:

– how big a bag do you need to carry everything on that kit list? Will I get it all in a Camelbak Mule?
– is there any off-road element, or would I be best off fitting slicks?
– the kit list recommends SPDs but surely then you'd have to carry running shoes too?

Cheers,

Simon