Can't add much to the above, other than perhaps a list of useful contact numbers, ie, local GP surgeries, NHS direct etc.

Plus you will need to check use by dates on any supplies you have. I find at home, often things go out of date before I get to use them. For personal use I'd take a chance, but if you are supplying for the group, discard anything thats out of date.

Do you keep an accident book? If so, perhaps that could be kept in or near the FA box to record any treatment needed.