The party said late yesterday that the lawmaker, Mike Amesbury, had been suspended “pending an investigation” after the Mail Online published a video of the violent incident.

It appeared to show the 55-year-old MP, who represents a parliamentary seat in northwest England, repeatedly hitting another man as others nearby shout: “Stop it”.

Police have confirmed a 55-year-old man was voluntarily interviewed under caution in relation to the incident, which occurred in the early hours of Saturday.

Cheshire Police said officers had been called to reports of an attack in the town of Frodsham, and that “further inquiries” were ongoing.

A spokesman for the Labour Party, which took power in Britain in July, said: “Mike Amesbury MP has been assisting Cheshire Police with their inquiries” following the incident.

“As these inquiries are now ongoing, the Labour Party has administratively suspended Mr Amesbury’s membership of the Labour Party pending an investigation.”

Amesbury has said in his own statement that he will “cooperate with any inquiries” but was “determined to remain an open and accessible MP for our community”.

He added he had been “involved in an incident that took place after I felt threatened on the street following an evening out with friends”.

He noted he had “contacted Cheshire Police myself to report what happened during the incident”.

“I will not be making further public comment but will, of course, cooperate with any inquiries if required by Cheshire Police.”

In July last year, a 56-year-old man was convicted of stalking the MP at his constituency office in Frodsham.

Prosecutors said the man had been seen staring through the glass and asked guards about their level of security.