Episode #1.7 - S1-E7
Visible crew/equipment: The Spitfire in the hanger has 1944 D Day markings in 1940. Also, this 4 prop Mark of spitfire wasn't available in 1940.
World on Fire (2019)
1 visible crew/equipment mistake in season 1 - chronological order
Starring: Sean Bean, Helen Hunt, Jonah Hauer-King, Julia Brown
Factual error: Vernon is referred to as a squadron leader, but wears the rank insignia of the higher rank of wing commander.