…A bit of a non-chill reply here, but apparently Unreal Engine can complete that wish.

Like, there was this captain America game set in 1943 Germany written by, I think, Uncharted’s writer, that was presented at State Of Unreal 2024. It looks insanely real and you can like, feel smoke in a burning barrel and all, so London could be modelled there as well.

Might not sound interesting - or maybe it isn’t even a “hot sauce”, but since it’s like, the only I know, schezwan.