I probably don’t have time to play this.
You can pick up FALLOUT LONDON at GOG, and they’re kind of suggesting that you grab a copy of FALLOUT 4 GOTY there and disable updates. This seems like a very good suggestion, because apparently it won’t work on Next-Gen Fallout and the developers aren’t even going to bother trying to keep up with the updates. I can’t say that I blame them much for that, either. Besides, I also think this replaces the base game, and people are still playing the base game. Heck, I’m finishing up Far Harbor as we speak.