I am thinking that having a wallet sized card, with what to do in the case of any collision would be *really* useful. What should the bullet points be?
Cycle Law Scotland's page here is a good starting point:
http://www.cyclelawscotland.co.uk/why-choose-us/accident-assistance/
I have a (slightly larger than wallet-size) card from them with the points from that page. It also adds:
"NOTE the registration numbers of all vehicles involved; the names, addresses and contact telephone numbers of witnesses; the road number."
"WRITE your own description of the accident, including as much information as possible (e.g. weather conditions, road conditions, direction of travel, street names, road numbers, skid marks, injuries and vehicle damage). Date this record and keep it."
It also has Cycle Law Scotland's phone number on it, of course, 0333 555 7783.