Just before Kevin and Chloe leave the house for their dinner date, the music that plays from the video the dogs are watching is the overture "Love Is A Song" from Bambi. When the television screen is shown later, however, the dogs are watching Lady and the Tramp.
As the Orient Express pulled out of the station the steam locomotive pulling the train was 4472 "Flying Scotsman" (A3 4-6-2): later at speed the locomotive had turned into "Camelot" (Standard Class 5 4-6-0), whose number would have been 73082, though it may not be visible.
Kevin is arrested and held in a British Police Station; the cell that he is held in has open bars as the front wall. This type of cell is not in use in British Police Stations, with the preference being for big single steel doors.