I remember reading this series in "2000 AD" comic as a kid (yes, I am that old lol).
https://en.wikipedia.org/wiki/Invasion!_(2000_AD)
It was a far-fetched story about one man's resistance to the "Volgans" (basically the Soviets) after they invade the UK. Could be good material for a Twilight 2000 campaign if you can find a copy.
[EDIT]
Actually it's easy to find a digital copy. There's an online store where you can buy PDFs of collections of these stories (three different books: "Invasion!", "Savage: Taking Liberties" and "Savage: The Guv'nor" - the main character is a working-class truck driver called Savage).