I believe I do have a timeline of events that you might find elucidative.
Deborah and her grandmother, Vanessa, are people watching. They speculate on the lives of passers-by, whom they variously nickname Big Coat, Sideburns, Earrings and Orange Shirt.
Although impressed with her grandmother’s skill, Deborah laments that the conclusions are never something more exciting, like the subjects being Russian spies.