Write up here on latest progress/issues with UK's ASTRAEA programme - incl using a Jetstream as a 'surrogate UAS'...
Drones of Peace | Aerospace | The Royal Aeronautical Society
The ambitious 'supplement police helos with UAVs for 2012 Olympics' timeframe (along with UAVs looking for smugglers on the South Coast) seems to have dissappeared...
But are we any closer to cracking 'sense and avoid'? Or will it forever be just 10-15years off?
(if I can get GPS, video etc on my smart phone - maybe in next decade there might be an auto-TCAS cheap/small enough that could go on a R/C model?)