Visitors must be aged 11 and over and be comfortable climbing 334 steps and experiencing high noise levels from the clock mechanism and bells - earplugs will be provided. The total tour duration is 90 minutes and toilet facilities are available at the beginning and end of the tour only.
What is Big Ben's formal name? The tower housing Big Ben was formally known as St.Stephen's Tower until 2012, when it was renamed Elizabeth Tower on the occasion of Elizabeth II's Diamond Jubilee, celebrating 60 years on the British throne.
The clock tower, which is also known as the Elizabeth Tower, is 315 feet (96 meters) tall and has 393 steps. The clock mechanism weighs five tons. Its pendulum is 12.8 feet (3.9 meters) long. The Great Bell weighs 13.5 tons.
Big Ben is a tower clock known for its accuracy and for its massive hour bell. Strictly speaking, the name refers only to the bell, which weighs 15.1 tons (13.7 metric tons), but it is commonly associated with the whole clock tower at the northern end of the Houses of Parliament, in the London borough of Westminster.