Undercover police officers have started a new campaign to crack down on men catcalling female runners - by posing as joggers themselves.
Surrey Police sent two officers out running at rush hour to show the scale of harassment that women are facing.
'These behaviours may not be criminal offences in themselves, but they need to be addressed,' a spokesman for the force said about the patrols.
The campaign, however, has been criticised by free speech activists who said the police should be focusing on enforcing existing laws.
A spokesperson for the Free Speech Union said the tactic amounted to 'bizarre social-psychology experiments'.
