The world map is about the size of the vanilla Fallout 4 Commonwealth and will let players experience everything from the heart of Westminster all the way to the rolling hills on the outskirts of Bromley. In terms of size, Fallout: London is 'a condensed version of London that focuses around the main boroughs.
Ignoring the fact that, in 2237, not many would expect to hear from Queen Elizabeth anyway, the prospect of finding the royal family as ghouls (and then blowing them away in VATs) is definitely another selling point. The reveal trailer also mentions that 'er majesty hasn't been heard from in years. A collection of texture mods by the same author, Vivid Fallout is a set that will beautify the everyday surroundings of Fallout 4.Enhancing the textures of various. In a similar vein, there will likely be a British Counterpart of Vault Boy, in terms of a popular mascot that will make frequent appearances.' So don’t expect Better Living, Underground.
We will have a version of a vault, but it will be entirely different from that of Vault-Tec, except that it is a shelter, beneath the ground. 'Vault-Tec is entirely an American company, thus it will have no presence in London.