Shocking footage has been released of a man being tasered by police officers after he stabbed another man in the chest outside a bank in Surbiton.

Binh Nguyen, 39, was jailed for 20 months for chasing a 25-year-old man down Victoria Road and stabbing him in the chest just before midnight on Thursday, March 17.

The CCTV footage shows Nguyen, wearing a red jacket, being approached by police officers outside HSBC as he holds a long knife in his right hand.

Nguyen is then tasered after he begins to wave the knife towards the officers.

Police had first been called after reports of a “serious incident” and were only told on the way that a man had been stabbed.

When they arrived they found Nguyen standing next to two people who were seemingly oblivious to the stabbing.

A first officer tried to taser Nguyen when he failed to put down the knife, but the connection failed and a second officer had to fire his taser before he fell to the floor, a police spokesman said.

Nguyen, of no fixed address, was arrested and taken to Kingston police station.

He was charged with causing grievous bodily harm and possession of a bladed article. He was jailed for 20 months after pleading guilty to both charges at Kingston Crown Court on Friday.

PC Paolo Resteghini said: “I would like to praise the bravery of the victim, he defended himself from the attacker and, despite being injured, ran away, a decision that I believe saved him from further injury.

“During the investigation he was able to provide me with outstanding evidence which I have no doubt led to [Nguyen] pleading guilty at the earliest opportunity.

“I would also like to praise the bravery of my response team colleagues, they went into danger and were able to detain the suspect before any further incidents took place.”