A young Labour councillor who assaulted his girlfriend in Romford town centre is stepping down from a leading party role after being warned about his future conduct.

Cllr Dan Young, 24, a member of Barking and Dagenham Council who has served as an aide to Rainham MP Jon Cruddas, will step down as chairman of London Young Labour after being cautioned by police, the Labour Party has confirmed.

A Labour Party spokesman said: “Dan Young has been warned about his future conduct and the responsibilities that come with being an elected representative of the Labour Party.

“He will be stepping down as chair of London Young Labour in the next two weeks when a new chair is elected.”

At least two members of London Young Labour have resigned over the incident, according to sources at Barking and Dagenham Town Hall.

Police were called to Western Road in Romford at 3am on Friday, October 31, to reports of a domestic assault, Scotland Yard said.

“A 24-year-old man was arrested at the scene for common assault against a 19-year-old woman,” said a spokesman.

“He was taken to an east London police station.

“Neither person required medical attention.

“A 24-year-old man was later issued with a police caution for common assault.”

Despite multiple approaches, Cllr Young has declined to comment.

Mr Cruddas’s office said Cllr Young has not worked for him for about three years, but was unable to comment further at time of press.

However, Cllr Young was photographed with Mr Cruddas and Labour’s leader Ed Miliband in May of this year.

The news came as Barking and Dagenham Council launched its White Ribbon campaign against domestic violence.

One launch event for the campaign on Tuesday of last week, Walk a Mile in Her Shoes, saw council leader Darren Rodwell in high-heels on a sponsored march through the borough.

Barking and Dagenham Council said it was unable to comment on Cllr Young’s arrest, adding the Councillor’s Code of Conduct “does not seek to regulate what a councillor can do in their private or personal life”.

A council spokesman said: “So far no complaints have been received by the council about this incident and it is recognised that the occurrence did not take place in the borough or in the line of [his] work as a councillor.”

A Town Hall source said complaints would have to be made by residents before Cllr Young could be referred to the council’s standards committee.

They said otherwise council rules mean a councillor has to consider whether they have broken the so-called Nolan principles of ethical standards for public office, and if so, whether they should resign.