How is “stand in” used?

In Signed, Sealed, Delivered: The Vows We Have Made (2021), one line is: “standing in the London Museum of Mail,”

Which movie is “stand in” from?

The clip at the top of this page is from Signed, Sealed, Delivered: The Vows We Have Made (2021).

to block or hinder someone from doing something; to judge someone or pass judgment on them; to wait one's turn in a queue; to take sb's place

Se oye en 92 películas

Definición editorial25% de las películas
to block or hinder someone from doing something
And I will let nothing stand in our way.
Definición editorial5% de las películas
to judge someone or pass judgment on them
Definición editorial5% de las películas
to wait one's turn in a queue
Oxford5% de las películas
to take sb's place
Could your servants stand in?

Definiciones del Oxford Advanced Learner's Dictionary, 9.ª edición

standing in the London Museum of Mail,

En 8 películas · n.º 1