What are the diplomatic principles pursued by Britain?

In the modern international relations of18th century and19th century, the idea of power balance prevailed among European powers. From the national level, Britain is the country that has used the idea of balance of power for the longest time, the most faithful and the best foreign policy effect. The diplomatic strategy of balance of power runs through almost the whole history of modern international relations. The successful application of Britain's idea of balance of power has played a positive role in maintaining the balance of power among modern European powers, avoiding the emergence of a hegemonic country with one country dominating the European continent, and enabling Britain to successfully implement the colonial empire strategy.