Uberhas hit back at claims by the police that it has been covering up sex attacks by its drivers.

On Sunday a letter emerged accusing the firm of failing to report incidents by its drivers to the police.

Inspector Neil Billany, head of the Metropolitan Police's taxi and private hire unit, has expressed "significant concerns" that the firm is picking and choosing what it reports to the police to protect its reputation.

It alleges a driver committed a sex offence on a passenger and was allowed to continue in his job but later committed a second offence.

Uber says the first offence was when a driver hugged a passenger and the second offence involved the same driver touching a passengers leg.