The document discusses three potential locations for filming external and internal house scenes as well as early morning scenes. The middle house was chosen for the external scenes because it had easier access and less background noise compared to the other options. It also had desirable features like a back garden entrance. The same middle house was selected for internal scenes for convenience and because it had more room for different camera angles. Finally, Wandlebury Nature Reserve was picked for the early morning scenes because it had the right forest environment, lighting, and accessibility for the group without noise distractions.