„Perhaps even less well known is the fact that back in 1972, Daphne du Maurier (a master of modern british fantastika literature) wrote a speculative fiction novel that, in a way, predicted Brexit.
“Rule Britannia” is set in a UK that’s joined, and then (following a referendum) leaves the Common Market (the EU’s predecessor, which Britain actually joined the following year in 1973).
The ensuing chaos – rising prices and high unemployment which leads to social unrest, combined with a breakdown of relations with Europe – resulting in the declaration of a nationwide state of emergency.
In sweeps the US, in the form of “friendly” invading Marines landing on the beaches of Cornwall, and a new superpower, known as USUK, is formed; the Cornish people, however, rise up in resistance.”
http://www.bbc.com/culture/story/20170609-why-daphne-du-maurier-was-britains-mistress-of-suspense