Separation with preceding aircraft during emergency
My question is for tower controllers.
You have only one runway, used for landings and departures. There is an aircraft making a straight in approach for landing. It is about 30 Dme to touchdown. Under APP controller.
APP controller is calling you and relays that, approaching traffic declaring emergency (engine problem).
At this moment you have two aircraft under your control. One is just reported outer marker and you already instructed to cleared to land. The second is about 12 DME. You instructed to report outer marker.
Do you give instructions to these two aircraft to go around in case, they may block the runway before your real emergency? Or you keep your optimism and let them land?