London taxi drivers are licensed and must have passed an extensive training course (the Knowledge). Unlike many other cities, the number of taxicab drivers in London is not limited. For many years purpose-designed vehicles were used, but from about 2008 specially adapted 'people carrier' vehicles have also been used.
Alfred Collins, who retired in 2007 at the age of 92, was the oldest cab driver and had been driving for 70 years. Fred Housego is a former London taxi driver who.