This shocking CCTV shows the moment a member of the public confronted a man with a gun during a bank robbery.
The incident happened in Teddington with a balaclava-wearing suspect escaping the scene with more than £150,.
The footage, taken from a bank in Broad Street, has been released by detectives from Metropolitan Police as part of an appeal to trace the suspect.
It appears to show the member of the public putting the armed robbery in a headlock.
On Friday March 10, at around 2.30pm, the suspect approached the Teddington bank and peered through the doors, the police said.
The man returned shortly after with his face concealed by a balaclava and began threatening staff with a gun he pulled from a blue carrier bag.
After demanding money, the man was confronted by a member of the public who tried to restrain the armed suspect.
However, after a brief struggle, the man managed to escape the scene with more than £150.
The suspect is described as a man aged between 30 and 40-years-old, who wore a grey hooded top with a cap, black gloves, black satchel bag and dark trousers.
He also wore Nike trainers with what appeared to be a red tick.
Detective Constable Mike Bunn, of the Met’s Flying Squad, who is leading the investigation, is urging anyone who recognises the man to come forward.
“This was a brazen robbery on a busy high street which left members of staff at the branch terrified,” he said.
“The robber travelled to the bank on a men's mountain bike and it is possible that he may live locally.
“I am urging anyone who recognises the man in the footage to contact us."
Anyone with information should contact Detective Constable Mike Bunn by calling 101.
Alternatively, call Crimestoppers on 0800 555 111 or visit crimestoppers-uk.org, quoting reference J/03680/2017 241386.