Editing Hackney carriage (section)

===Driver qualification===
In London, hackney-carriage drivers have to pass a test called [[Taxicabs of the United Kingdom#The Knowledge|The Knowledge]] to demonstrate that they have an intimate knowledge of the geography of London streets, important buildings, etc. Learning The Knowledge allows the driver to become a member of the [[Worshipful Company of Hackney Carriage Drivers]]. There are two types of badge, a yellow one for the suburban areas and a green one for all of London. The latter is considered far more difficult. Drivers who own their cabs as opposed to renting from a garage are known as "mushers" and those who have just passed the "knowledge" are known as "butter boys".<ref>[https://www.theguardian.com/world/2012/dec/09/history-london-black-cabs The history of London's black cabs], theguardian.com, 9 December 2012.</ref> There are currently around 21,000 black cabs in London, licensed by the Public Carriage Office.<ref>[http://www.kabsure.co.uk/public-carriage-office.html About the Public Carriage Office], {{cite web|url=https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/751202/taxi-and-phv-england-2018.pdf|title=Taxi and Private Hire Vehicle Statistics, England: 2018 |page=2}}</ref>

Elsewhere, councils have their own regulations. Some merely require a driver to pass a [[Disclosure and Barring Service|DBS]] disclosure and have a reasonably clean driving licence, while others use their own local versions of London's The Knowledge test.{{citation needed|date=May 2017}}