Hello,
I've just gone hunting for info on data protection guidelines for volunteers. It seems like this page is defunct, and should probably be removed completely (the links don't work):
http://www.theiet.org/volunteers/resources/policies/data-protection.cfm
I found this page instead, which seems to be current:
http://www.theiet.org/volunteers/active/how-iet-works/data-protection.cfm
Just a heads up for anyone else looking for this information.