This chapter assesses BRT development in Britain, in which about 12 substantial schemes were in operation by June 2017. These include both guided and unguided busways, all of which are integrated with the local road networks to offer through services. Bus operation as such is generally commercial, with capital investment provided largely by public authorities. Given extensive rail systems in Britain, densities of traffic are relatively low. Encouraging ridership figures and diversion from cars are reported for several schemes. Economic appraisal prior to construction enables anticipated benefit-cost ratios to be identified, and in two cases ex-post ratios may also be calculated from observed data, which are higher than the forecast case. Detailed assessment is provided of the Fastway and South Hampshire cases, and of modal diversion and energy savings arising from the Cambridgeshire case. A tabular outline is also provided of the principal characteristics of other schemes.