In pictures: London’s black-cab drivers protest fare competition

A smartphone displays the Uber mobile application, which allows users to hail private-hire cars from any location. The controversial app currently serves more than 100 cities in 37 countries. Oli Scarff / Getty Images

Above, a composite image of taxis on the streets of Westminster. London’s black cabs are seeking a judicial review whether using Uber are effectively metering fares because the app uses GPS tracking to measure the time and distance travelled by private-hire cars. Oli Scarff / Getty Images

London's Licensed Taxi Drivers Association have issued summonses to six Uber drivers on the grounds that it is illegal for private-hire vehicles to be fitted with meters. Oli Scarff / Getty Images

Licensed drivers in cities across Europe and America are protesting at the new wave of taxi-hailing services such as Uber. Oli Scarff / Getty Images

Black-cab drivers claim that cars using Uber are effectively metering fares because the app uses GPS tracking to measure the time and distance travelled by private-hire cars. Oli Scarff / Getty Images

Uber now operates in more than 100 cities across 30 countries. In the UK the private-hire service covers London and Manchester. Oli Scarff / Getty Images

London's Licensed Taxi Drivers Association have issued summonses to six Uber drivers on the grounds that it is illegal for private-hire vehicles to be fitted with meters. Oli Scarff / Getty Images

Black-cab drivers claim that cars using Uber are effectively metering fares because the app uses GPS tracking to measure the time and distance travelled by private-hire cars. Oli Scarff / Getty Images

The London cab-drivers union is planning a mass protest on June 11 with drivers parking in Parliament Square, Trafalgar Square and along Whitehall in central London. Oli Scarff / Getty Images

London’s black cabs are seeking a high court ruling on the claim that the Uber software is breaking the law by using an app as a taxi meter to determine rates.