6 Things You Didn't Know About Southwark Bridge In London

A Tale of Two Bridges

The Southwark Bridge we see today is actually the second incarnation. Its predecessor opened in 1818 to alleviate congestion on the existing London and Blackfriars Bridges. Unlike those crossings, which were managed by the City of London, this new bridge was a private venture, funded by the Southwark Bridge Company. Their primary goal was not civic improvement, but to generate substantial profits from toll charges.

A Marvel of Iron and Ambition

Technically, it was a masterpiece. Constructed with vast amounts of iron from Rotherham, its central arch spanned 73 meters—a world record for cast iron that still stands. Contemporary newspapers hailed it as "a magnificent and elegant structure, almost ethereal in its appearance." One commentator even noted, "It is a curious fact that the centre arch exceeds the height of the Monument's column by 38 feet." Deemed a modern wonder, its opening ceremony was held at midnight to control the enormous crowds.

A Troubled Birth and Financial Ruin

However, this "magnificent" project was also a monumental failure. The human cost was staggering, with at least 47 workers losing their lives during construction—a grim toll even for that era. In one horrific accident, 13 labourers drowned when their overloaded boat capsized. Financially, it was a disaster. Cost overruns were so severe that the engineer, John Rennie, had to take the company to court to get paid. The toll of one penny per crossing failed to attract users, as London and Blackfriars Bridges remained free and had gentler slopes, crucial for horse-drawn carts. Its lack of use became a literary footnote; Charles Dickens described it in Little Dorrit as being "as quiet... as though it had been open country."

A Fresh Start with Steel

The City of London eventually took over the bridge and scrapped the toll in the 1860s, but the steep gradient continued to deter traffic. A 1912 survey starkly revealed its status: it carried just 24,432 vehicles a week, compared to over 125,000 on London Bridge. The decision was made to replace it entirely. The new design, by Sir Ernest George and Basil Mott, featured five steel arches instead of three iron ones, creating a shallower, more practical roadway. Construction began in 1913 but was severely delayed by the First World War. Demolition of the old bridge revealed a poignant foundation stone from the Napoleonic era, mirroring the new bridge's own construction during a global conflict. It finally opened in 1921, funded by the Bridge House Estates trust, which continues to maintain London's bridges today.

Modern Idiosyncrasies and Echoes of Tragedy

The current bridge, now over a century old, is far busier than its predecessor but remains one of central London's quieter crossings, partly due to the road layout. It has, however, become a key route for cyclists. The bridge has its own unique character: its colour is a distinctive murky green-turquoise, and it is adorned with trident-shaped lampposts and porthole-style viewing windows in the parapets. The pedestrian tunnels at either end feature historical displays, including diagrams of the bridge and scenes from Thames frost fairs.

It also holds a curious administrative distinction: only the northern half lies within the City of London, while the southern half belongs to the Borough of Southwark. This led to a brief period in 2014 where the two halves had different speed limits.

Tragedy has also marked this newer structure. In 1989, the Marchioness pleasure boat sank near the bridge after a collision, resulting in the loss of 51 lives—the worst peacetime disaster on the Thames in London.

A Legacy of the Unconventional

Southwark Bridge's history is one of grandeur, grief, and peculiarity. A fittingly bizarre anecdote from its early days captures its unique spirit: shortly before its completion, a performer known as Usher the Clown launched himself from the bridge in a washtub pulled by four harnessed geese, traveling all the way to Vauxhall. It was a strange celebration for a bridge that has always been, and remains, well worth a closer look.