British Chancellor of the Exchequer Sajid Javid visits Trafford Park Metrolink line in Manchester.

The video discusses a scenario involving leaving doors open at an airport for friends to enter. It then estimates the number of passengers expected, clarifies the context regarding passengers on a tram, and concludes with expressions of gratitude.

What is the significance of leaving the doors open in the airport?

Why is the speaker not 100% sure about the passenger figure?