Fallout: London is a total conversion mod made by Team FOLON for Fallout 4: Game of the Year Edition and requires you to own the base game on either GOG or Steam.
Fallout: London lets you explore a dishevelled London set in the Fallout universe. It overhauls Fallout 4 with a new story, new weapons, London-centric items and a vast recreation of the ruined city to explore.
Fallout: London is a free total conversion mod for Fallout 4, available to anyone who owns the base game and all of its DLCs. It is developed non-commercially by Team FOLON, many of whom are proud London residents or expats.
Learn more about Fallout: London:
Download Fallout: London for free on GOG:
https://www.gog.com/en/game/Fallout_london