Police are investigating after a man was seen touching himself while on a Piccadilly Line train. 

A bystander witnessed a man winking at women while touching himself over his jeans on Tuesday, January 30.

The incident took place on a westbound train at around 7pm.

Detectives have now released an image of a man they would like to speak to.

British Transport Police (BTP) said they believe he may have information that could help their investigation. 

Anyone with information can contact BTP by texting 61016 or calling 0800 40 50 40 with the reference 542 of 30 January. 

Alternatively, you can contact Crimestoppers anonymously by calling 0800 555 111