IGN : Atomfall, dubbed 'British Fallout,' has a March 2025 release date and a new trailer.
Survival action game Atomfall story expansion downloadable content “The Red Strain” will launch on September 16, developer Rebellion Developments announced.

Wicked Isle is the first DLC for Atomfall, the recent first person action adventure game set in alternative history 1950s England.

Atomfall is a uniquely British game with a real-world inspiration that sets players on their own path to escape a nuclear nightmare.
I'm looking forward to this, but anyone referring to it as "British fallout" is being disingenuous at best.
I like the vibe of this, dying light + outer worlds