Yep, great substitute for radar. Yesterday morning I watched an American 767 "landing" just north of Slought and a BA 777 "landing" just north of Windsor! Inrtegrity is not it's best point.
Thats because we haven't made it mandatory for the aircrew to reset their GPS as part of ADSB
Also, the "Planeplotter" software uses triangulation from multiple SBS users which makes the plots very accurate.
I would say it would probably have been ideal out over the North Sea for the Heli-chopters that wizz around there. Im not saying use it for LHR
Just out of interest Director, how many did you see that weren't out of place?