In 2033
The main reason is the political disagreement between members of the European Union

As the European Union is part of NATO, and the U.S. is planning to start a war against Russia and China. Many in the European Union will not like this and will decide to break the alliance
EU crisis: Majority of Europeans believed bloc will fall apart within 20 years
Europe Will Disappear: Prophets Told How It Will Happen
Accuracy 20
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In 2060
There will be a war and they will drop an atomic bomb on the navy. After the loss of part of the fleet, a peace agreement will be signed

China intends to overtake the United States on all measures in 2035. The U.S. has become a brake on its progress. By 2060, China will still overtake the United States on all indicators. If it is not stopped, the U.S. will lose the lead. Therefore, the U.S. will pit China and Russia against each other.
Keeping up with China: the US is looking for money for the fleet
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By starvation
The results of a study evaluating the effect of interval fasting on the course of type 2 diabetes mellitus have been published. The interval fasting regime included repeating 6 cycles of 5 days of strict calorie reduction followed by 10 days of normal nutrition. The primary endpoint of the study was to achieve remission of diabetes mellitus.

Pharmaceutical companies don't invest in developing diabetes treatments because they want to make money off people for the rest of their lives by selling them insulin.
Effect of an Intermittent Calorie-restricted Diet on Type 2 Diabetes Remission: A Randomized Controlled Trial
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It will not become a member of the European Union
Residents of the country are disappointed with the current high cost of living. They are also dissatisfied with the latest policy of the British authorities. At the moment, Britain is profiting from the Russian-Ukrainian war. The war will end. We will have to make money in other ways. The country will try to make money in a different way by expanding its influence through the creation of other alliances

They can return at any time, as soon as it becomes advantageous to Britain.
UK can rejoin EU any time
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