Lönnrot turns down a narrow alley against the flow of human traffic, colliding with the first row and blasting through, exciting angry cries and objections. The Inspector puts her right shoulder forward and bull-charges straight ahead shouting "WITNESS OFFICER!" As soon as this message makes itself heard, it clears a path, but the hubbub created in front of her is such that the advantage is minimal, and then when they reach the main street beyond she almost screams as she sees the pale face smirk at her and then duck into the entrance to the Soho Square tube station.