If NBC was indeed seen sitting at the roundabout bustop...
IMO it makes perfect sense to me that NBC's role was as a 'spotter'.
I doubt he would be much use for anything else going by the footage in this link.
0.25 - clearly shows NBC struggling with the simple task of removing of a box from the car.
http://video.au.msn.com/watch/video/no-luck-yet-for-missing-mother/xp1r8ud
Sorry if this has already been discussed.
It just doesn't make sense for someone to be a "spotter" at such an obvious and public place IMO. Also, police could also head out to anstead from Ipswich, bellbowrie etc and he wouldn't be able to "spot" them from the roundabout. Sorry I'll stop dissing this roundabout story from now on, but I just don't believe it as it makes no sense at all to me.