How many movies have David Stoten and Reverend W. Awdry collaborated on?

They have worked on 4 movies together! Their first movie together was Thomas & Friends: Sodor's Legend of the Lost Treasure: The Movie (2015) while their highest rated movie together was Thomas & Friends: Big World! Big Adventures! The Movie (2018). They have not worked together since Thomas & Friends: Big World! Big Adventures! The Movie (2018). They are most known for their animation films together.