How to start Fallout 4: London

Actually, Fallout 4: London isn't an official expansion or DLC from Bethesda! It's a large, fan-made mod for Fallout 4 that brings players to a post-apocalyptic London. So, to start it, first, make sure you have Fallout 4 installed on your PC. Then, grab the mod from a reputable mod repository, like Nexus Mods. Read the installation instructions carefully, as modding can require some specific steps. Once installed, load up Fallout 4, and you should find options to start exploring London in the game's menu. Enjoy the British wasteland!