Vortex 5
If it helps, there is no specific airway connecting Edinburgh and Leuchars.
Edinburgh has a10nm radius control zone which is below the terminal manouvering area. The airways from down south link onto the TMA and descend into the control zone which have more restrictive rules as they are busier airspace.
Leuchars has a 5nm radius military air traffic zone around it but outside this zone is open airspace available to all.
Hope this answers your question in simplistic form