Concorde Military Contact

[JamieFDalton]

As concorde flew at flight levels only used by military aircraft were there ever times during real world flights that Concorde crew spoke to pilots of military aircraft nearby or had TCAS alerts from military aircraft at cruising altitude? Or were the routes planned so there was no chance of that happening?

Were the crew trained to respond to military contact and did they have the radio equipment for military frequences? I ask because if it happened then an addon to create the random chance of a cruising altitude encounter with a stealth bomber on a practice mission would be interesting. Perhaps just a 40nm TCAS warning or direct contact from the pilot declaring their intentions.