The former Labour politician had arrived at court in a prison van and wore handcuffs as he was led into the building.

The court heard that, in a prepared statement given in a police interview, Amesbury claimed he had been approached by a man “shouting and screaming” about local and national matters.

The MP said that, because he was terrified and the other man’s “arms were swinging”, he felt he had no option but to “defend” himself.

But the judge told him the CCTV pictures revealed a very different story.

“In reality, you told the police a pack of lies. Nothing more, nothing less,” he said.

Judge Everett questioned why a charge of affray – which can carry a longer sentence – had not been brought by the prosecution.

Daniel Travers, defending Amesbury, told the court: “He’s now had three nights in prison which is an experience he will never forget, certainly.”

He said the “public shaming” and “embarrassment” had had a huge impact on his client.

“This is a man who will certainly rehabilitate,” said Mr Travers. “He will learn a very painful lesson.”