The Fallout: London total overhaul mod has been a hit in the Fallout community, especially with the drought of new Fallout to play after the TV series came out. Unfortunately, some are experiencing frequent crashes with the game. If you're one of them, we have a few ideas on how to fix it.
Fixes for crashes in Fallout London
Fortunately, this isn’t a case where you simply have to wait for the developer to fix the game; there are several solutions available. If one doesn’t work for you, simply try the next (or a combination of them).
Open the Fallout 4 launcher and navigate to the 'Decals' option, the graphics settings and disable them. This may only work if you have an NVIDIA RTX series card (e.g. 2xxx, 3xxx, 4xxx series). However, if you're willing to go through the trouble of installing a mod, the Weapon Debris fix below should be better.
Disabling this setting in the graphics menu (via the Fallout 4 launcher) should immediately improve stability for some users, but should only slightly degrade the experience.