In reply to jamiebartlam:
I personally would say that the Yat is good for groups if you control the risks and choose the right area. For example in some locations you could have your party wait on the safe side of the fence and have them belayed before they step over it.
Locations I recommend; the wall left (as you look up) of needle rock gully, you can set up solid anchors on the trees behind the fence, the cave provides an added excitement for adventurous groups. To the right bannister and arch wall are also good candidates with solid rock, a cave to shelter your group in and easy access to rig ropes by soloing needle rock gully, out of sight of the group.
Nansen corner and crack are if I remember rightly good but check that as I can't remember where the fence is.
Far South Buttress also has a flat top out area and safe and short walk to the top and bottom. I have seen groups there often but yellow grip road was loose if I remember rightly.
Time spent in reconnaissance is seldom wasted maybe abseil it yourself to check for loose rock etc before committing a group.
I would avoid the 'introductory rocks' area as the top outs here are often appalling.