Which event is celebrated in November in London?

The Lord Mayor's Show is a historic event that takes place annually in November in London, marking the inauguration of the newly elected Lord Mayor of the City of London. It has a rich history dating back to the 13th century and includes a grand procession featuring floats, street performers, and a variety of participants that highlight the city's traditions and civic pride. The event draws large crowds and is characterized by its pageantry and festive atmosphere, making it a significant occasion in London's calendar.

The other events mentioned are celebrated at different times of the year. The Trooping of the Colour occurs in June and celebrates the official birthday of the British monarch. The Queen's Speech is typically delivered at the State Opening of Parliament, which takes place in the spring. The Chelsea Flower Show occurs in May and is known for showcasing garden designs and horticultural excellence. Each of these events has its unique significance and timing, placing the Lord Mayor's Show as the correct choice for November.