In the beginning after the tube train slowly came into the station and people were leaving the platform you can read on the left upper side that is was Archway Station (Northern Line). Later when Lana Sutherland leaves the station, before she meets Owen, you can read Finsbury Park Station (Victoria Line).
In the first scene on the underground the rear lights of the train were still lit as they examined the body. The power would have been turned off before they were allowed near the tracks.