The document discusses potential filming locations for an opening sequence involving flashbacks. It will primarily be shot at a train station, with flashbacks filmed in two other locations. The first flashback of arguing foster parents will require a house-like location with a narrow hallway. The second flashback of a hand grabbing a bottle can be filmed anywhere with a suitable floor. Several train stations are considered before settling on Leicester station for its isolated area. A friend's house and the document's author's school are also considered for the house flashback location.