Flat 20, Fourth Floor, Nearby Tower Block

Postman reports swarms of flies and a foul odor seeping from Flat 20 on the fourth floor of a tower block near Norland Road Police Station. Catherine Cawood senses deeper trouble than a dead dog—perhaps Tommy Lee Royce's hideout or another crime scene. The stench alerts police to potential evidence of his movements, drawing them into a grim investigation amid urban decay.