The Scottish now have a strong percentage of their population towards seceding from the United Kingdom. After their loss of India in 1948, It was all downhill from there. It was right after WWII and the UK's economy was in ruins, along with the cold war started. Along with broken elections and revolutions cropping up, this will add up to slowly knock Britain's importance off the world stage.
When Britan gets older, more people would focus on the worldwide aspect of things, coming from the rise of Donald Trump in the states. More people would not really look into the history books about Europe, especially Britan, because when the technology improves, our minds will be swept away from all of that