I was just pointing out gently that police helicopters have 4 separate Airwave radios, and that in complicated places like London you need all 4 to maintain comms in a command/control type job (plus the ATC comms). Unless it has changed, most of the mil helicopters have only one airwave radio.
The other issue is that Airwave is not like a "normal" radio. It can only communicate on the talk groups that it is "filled with". There is a distinctly finite limit to the number of talk groups that any one airwave set can be filled with.
Those who have already been engaging in cross border operations know there are limitations to the kit wrt comms and mapping. It is mainly the storage capacity of the fitted equipment. This is before you take any account of such soft but important things like crew knowledge.