I've ben asked to allow a small group of kids access to all World Cuip related sites, but do not want to give it to the entire pupil population access
How can I grant access to that small group whils they are still blocked for the usual array of sites and the other kids are still blocked?
Move them into a new group? How easy this is willl obviously depend on how compley your filtering rules are...
That is about the size of it at the minute (we're releasing "additive groups" for autumn half-term). You'd have to create a new group with all their current rights (except those applied ot all users, which ARE already additive) and add world cup to that.