Stroll as a result of Piccadilly Circus like Harry, Ron, and Hermione did at the same time as fleeing Death Eaters in Deathly Hallows

https://www.4shared.com/s/fxH5bXkndge

Stroll because of Piccadilly Circus like Harry, Ron, and Hermione did at the same time fleeing Death Eaters in Deathly Hallows, mixing magic with city lights.