I'm making a simulation game and there's a large focus on the humanitarian effort military personnel put in, putting aside the shooting and more on the story. Part of this is a Medical Emergency Response Team (MERT) landing with radio communication in the background, which obviously is using callsigns.
For the purpose of realism, I am trying to find references for what callsigns are used for these MERT aircraft/teams. Does anyone have any idea what a MERT team might be called? I'm looking specifically for UK forces however NATO is also fine.