Taxis in the city of London were initially called hackneys. The word itself came from “hacquenee” a Norman French word, which was used to mean a horse could be hired. In fact, the term is still there today, most people, especially the older generation, always call the taxis hackney cabs.

The term "hackney" originates from the Norman French word hacquenée, which referred to a horse of medium size and stature that was suitable for hire, as opposed to a high-bred war horse. By the 17th century, the term was applied to the four-wheeled, horse-drawn "Hackney Coaches" that began operating for hire in London. While some mistakenly believe the name comes from the London borough of Hackney, etymologists argue the reverse is more likely true—that the area may have been known for the horses raised there. In 2026, the legal term for a London black cab remains a "Hackney Carriage," distinguishing it from "Private Hire" vehicles (like Uber) which cannot be hailed on the street. This historical moniker has survived for over 400 years, transitioning from horse-drawn carts to the electric TX models of today, and it still represents the gold standard of regulated, street-hail taxi services that must adhere to strict "Conditions of Fitness" regarding turning circles and accessibility.