London covers 600 square miles and has a population of 8.6 million, but only its oldest part, just one square mile in size, is called the City of London. That is where the Romans founded the city of Londinium shortly after they arrived in 43AD. Today, the City of London – or simply “the City” – is the centre of London’s finance industry. The City is where you find the Bank of England, the London Stock Exchange, the investment banks, insurance companies and financial markets. It combines the most modern headquarters buildings with Roman remains and medieval churches, and it is great to explore on foot.

Going to the theatre has always been an important part of any trip to London. Not only does the city boast some of the great theatres but ticket prices are usually reasonable. It is also home to the world’s longest-running play, The Mousetrap by Agatha Christie. The story has been at St Martin’s Theatre for over seventy years. London also hosts the world’s two longest-running musicals. Les Miserables and The Phantom of the Opera have been running on the London stage for nearly forty years. Les Mis, as it is commonly known, celebrates its fortieth birthday in October 2025, and Phantom passes the forty-year mark a year later.