Residents reported seeing flashing lights in the sky as production work began at Canal Street, St Helens, at the former Pilkington Watson Street Works.
Oblik Productions confirmed to the Star in September that filming for a Second World War Netflix film called The Immortal Man.
An article on whats-on-netflix.com suggests that the project is a 'Peaky Blinders' film.
It says that a "long-awaited Peaky Blinders movie" entitled The Immortal Man is soon heading into production and will be "set during World War II".
It says Cillian Murphy will reprise his role as Tommy Shelby from the hit TV series.
The article adds that Tim Roth is also among the cast members to have been confirmed, and it was reported that Tom Hardy has signed on for the movie.