The train ride.

16:20 Descent from street, onto platform
16:20 Move past the accordionist.
16:26 The train departs.
16:31 Platform ambience
16:35 Next train arrives, departs.
16:44 Listen to amusing female voice intoning “Mind the gap”
16:45 Board train
16:53 Listen to tube chatter
17:10 Get off train
17:14 Embankment arrival