Britain’s speculative railway boom that collapsed during the financial crisis of 1847 was called Railway Mania.
During the 1840s, investors rushed to finance railway companies and proposed routes across Britain. Parliament approved hundreds of projects, and shares often rose before lines were built or profits demonstrated. Railways promised faster transport, expanding trade, and large returns, making them especially attractive to middle-class investors.
The Bank of England raised interest rates in 1847 as financial strains intensified. Share prices fell, financing dried up, and many railway schemes were abandoned, merged, or delayed. The collapse contributed to a wider financial crisis and exposed how speculative enthusiasm had outrun realistic estimates of demand and construction costs.
Railway Mania did not mean that railways were economically useless. Many successful lines survived and transformed Britain’s transport system. The lesson was instead that valuable technology can still become the focus of a dangerous investment bubble.