In 2016, Transport for London (TfL) commissioned an external consultant, Steer Davies Gleave, to carry out a study of supply and demand in London’s taxi and private hire sectors. The study was carried out by means of passenger focus groups and surveys, as well as taxi and private hire driver diary surveys to assess wait times, market sizes, passenger usage and the impact of apps given the advent of app technology in both sectors. A number of reports were produced, the last of which was provided to TfL in October 2017.
The study has been used in two reviews of taxi fares and tariffs and in work exploring use of different modes and journey patterns. It has been published by TfL following requests from taxi trade representatives.