Having my son recently diagnosed with T1D, I've found the IDDT to be a fab resource.
This passport would be especially good for evening and weekend clubs too.
There's a huge variance in club leaders who assume that as they've completed a First Aid course, they are fit to deal with any medical emergency and those who see it as not being their problem and those who generally want to know more. Being able to bring along a passport to each and every group would be a great idea.
Thanks Martin!