<p>History of Billboards in London<br />1830s-1840s: The origins of billboards in London can be traced back to the early 19th century when printed posters and handbills were used to advertise theatrical performances and public events. These were often pasted on walls and buildings, particularly in busy areas like Covent Garden and the Strand.<br />1860s: With the advent of lithography, more colorful and eye-catching posters began to appear, increasing the popularity and effectiveness of outdoor advertising.</p>