Yes, Fallout 4's next-gen update will affect Fallout: London, but don't worry, the mod's team has already come up with a plan of action
Briefly

As some of you may have noticed, Bethesda is scheduled to release an update to Fallout 4 just two days after our intended release date," he wrote, "We are actively monitoring the situation closely.
After thorough internal discussions, the team has reached a consensus on the best course of action moving forward. Consequently, we will be releasing a video this Saturday to provide insight into our decision making process and the steps we are taking in response to the current circumstances.
We do understand that the news is both exciting and concerning for everyone involved," Carter added, "Nevertheless, we kindly ask for your patience and ask that you give us the opportunity to address this matter in our video on Saturday. Stay safe and remember. Mind the gap.
Read at VG247
[
|
]