OMSI 2 Add-On: London is a paid official DLC developed by Rhys McCollin and published by Aerosoft; there is no legitimate official "free download link" for the full version. It was released on December 10, 2020, and is available for purchase on platforms like the Steam Store Just Trains Aerosoft Shop Key Features
The official DLC, developed by Rhys McColin and published by Aerosoft, is the only way to access the fully detailed recreation of London with 16 routes and specialized vehicles like the New Routemaster. omsi 2 addon london free download link
Instead of chasing a risky free link, consider these options: OMSI 2 Add-On: London is a paid official