Norland Road Police Station, Corridor by the Briefing Room

Uniformed officers stream from the briefing room into this bustling corridor at Norland Road Police Station on Day 17. Ann Gallagher draws Catherine Cawood aside, voice low, to detail John Wadsworth's furtive phone calls and desperate £1,000 plea during house-to-house inquiries. Suspicion of blackmail—or worse—thickens the air until Joyce interrupts, ushering Catherine toward Graham Tattersall in a nearby room. Fluorescent lights buzz over scuffed floors as post-briefing energy carries whispered accusations and fractured trust.