What is the essence of the ideas of liberalism and economic freedom? Why are they most successful in the UK?

In freedom of speech and in equality. They took root thanks to evolutionary development in Britain. The high demand for wool led to the fact that the feudal lords gave freedom to the peasants, and they themselves launched sheep on the peasant lands, turning them into pastures.
Having become rich, the feudal lords demanded freedom for themselves. A war broke out between their parliament and the king. The king’s head was cut off. So England became a “free”, “liberal” country. The ideas of liberalism were laid by John Locke. They are related to the protection of civil liberties through the separation of powers.

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