Yes, London does have a flag! The flag of the City of London features a red cross on a white background, similar to the flag of England. In the top left corner, it has a red sword pointing upwards, which is said to represent the sword that beheaded Saint Paul, the patron saint of London.
It’s worth noting that this flag specifically represents the City of London, also known as the Square Mile, which is the historic and financial heart of the city.
Saint George’s flag – a red cross on a field of white with Saint Paul’s sword in the top left corner
Saint George was adopted as England’s patron saint in the 13th seventh, and St Paul is the patron saint of the City of London.
Saint Paul became the patron saint of London in 604 CE. This was when King Ethelbert of Kent built the first church dedicated to Saint Paul in the city of
London. The church was consecrated by Saint Mellitus, who was appointed by Saint Augustine to preach in the East Saxons’ province