Which city is recognized as the largest in the UK by population?

London is recognized as the largest city in the UK by population due to its extensive metropolitan area and its role as the capital city. It is a major global city known for its influence in finance, culture, and politics, attracting people from all over the world. According to estimates, London’s population exceeds 8 million, significantly larger than that of Birmingham, which is the second largest city, and both Manchester and Glasgow, which have smaller populations. This demographic dominance reflects not only the city's size but also its historical significance and the opportunities it offers, making it a central hub for migration and urban growth in the UK.