As of 2026, there are three primary ways to secure a London black cab. First, you can use the traditional method of hailing one on the street; if the yellow "Taxi" light on the roof is illuminated, the driver is available. Simply raise your arm clearly as they approach. Second, you can use specialized mobile apps like Gett or FREENOW, which allow you to e-hail a licensed hackney carriage to your exact location, often providing a fixed price and the ability to track the driver in real-time. Third, you can call a dedicated Radio Taxi line such as +44 20 7272 0272 (Computer Cab) or +44 20 3929 3786. Black cabs are the only vehicles in London allowed to use bus lanes, making them significantly faster during peak traffic. They are also universally wheelchair accessible and have drivers who have passed "The Knowledge," a legendary test requiring them to memorize 25,000 streets and 100,000 landmarks within a 6-mile radius of Charing Cross.