Police radio systems are just about finished with a major upgrade. Some forces on 1st Generation, some on an upgrade. The idea is that a policeman in london should be able to talk to a policeman in scotland without difficulty. (That is the idea!!) O2 are providing this service, which is improving all the time. Military and Ambo helicopters do not have that facility....Yet. A simple bolt on cradle should become available, however the cost will probably kill off the chances of a fit. Our heli has a coastguard radio fitted, which is used fairly regularly. At major incidents, like the recent train crash, things seem to muddle through. When all else fails, 121.5 is always available!!