What is the name of the headquarters that appears in Assassin's Creed Syndicate?

The Train Hideout is the mobile headquarters in Assassin's Creed Syndicate. It is a train that Jacob and Evie Frye use while operating in industrial London during the Victorian era.

The train functions as a travelling base and moves through London's railway network. It provides a place to access upgrades, manage activities, and plan the twins' campaign against the Templars. Its mobility reflects the importance of railways and rapid transportation in nineteenth-century London.

Syndicate takes place in 1868 and follows the Frye twins as they build an Assassin gang called the Rooks. Jacob focuses heavily on direct action, while Evie investigates the search for a Piece of Eden. The train should not be confused with the gang itself: the Rooks are allies and operatives, whereas the Train Hideout is the headquarters.