FYI I had a pretty easy time getting it going with FO4 from GOG via Heroic Launcher. The main sticking point is that Fallout London and Fallout 4 need to be configured to use the same Wine prefix folder since they need to share a bunch of files for Fallout London to work.
I’d love to play it, but it’s been pain enough getting fo4 running on Linux and no one had a serious guide on doing London when I tried.
FYI I had a pretty easy time getting it going with FO4 from GOG via Heroic Launcher. The main sticking point is that Fallout London and Fallout 4 need to be configured to use the same Wine prefix folder since they need to share a bunch of files for Fallout London to work.