BENTON: UNIT Headquarters. BROTON: I control the Skarasen! He plans to attack some target in London. Prepare for descent. That's the end of the Zygons, eh?
Plan: A: UNIT attempt; Q: Who is trying to track down the Zygon ship? A: London; Q: Where does Broton plan to have the Skarasen attack? Summary: UNIT attempt to track down the Zygon ship while Broton prepares to have the Skarasen attack London.