Police have made an arrest after a man was photographed allegedly masturbating on a Dartford train over the weekend.

The incident is said to have happened around 7.45am on Saturday morning (May 16).

A photo of a man appearing to masturbate was posted on Twitter by @HannahTweedy.

A Gravesend man, 44, was arrested yesterday (May 20) and has since been bailed.

A British Transport Police (BTP) spokesman said: "A 44-year-old man, from Gravesend, was arrested on Wednesday, May 20, on suspicion of outraging public decency.

"He was interviewed by BTP officers under caution and subsequently released on police bail, pending further enquiries.

"The investigation follows the publication of an image on social media.

"Officers are no longer appealing for the person who took the photo to come forward."