Third of Uber's UK drivers logged into app for more than 40 hours a week

The app has been attacked by trade unions and lawmakers who say that some of its drivers are working excessively.

LONDON: Nearly a third of Uber's 50,000 drivers in Britain are logged into the app for more than 40 hours a week, whilst just under 8% are online for more than 60 hours, the company said in a letter to parliamentarians published on Wednesday. 

The app has been attacked by trade unions and lawmakers who say that some of its drivers are working excessively, one of many criticisms it has faced about its business model.