This is the shocking moment a British woman was knocked out with a single punch by a security guard - when she confronted him for sleeping on duty.

Married mother-of-one Ayesha Jane Cox, 37, from Eastbourne, was furious that Mohammad Ayan, 27, was napping while being paid to patrol the Modern Home Tower apartment block where she lived in Bangkok, Thailand, at 3:30 am.

CCTV shows how Ayesha began arguing with Mohammad and shoved him on the shoulder in 'self defence' because he was allegedly following her.

However, the guard responded with a sucker punch that left the schoolteacher sprawled on the ground writhing in pain.

The attack happened in December 2021 but an arrest warrant was only issued for Mohammad in September last year and the case was publicised again this week on April 25 as the family sought to find the suspect.

Ayesha suffered a black eye, bruised jaw, fractured cheekbone and swollen cheekbone following the alleged assault.

She said: 'My life will never be the same again. My face has been permanently damaged.

'I don't know why he attacked me but my only guess can be that I woke him up while he was sleeping. In the video clip, the only thing that I am telling him is to leave me alone and go back to work but he kept following me.

'It's not good for a man to follow a woman, I felt scared. He didn't stop. He kept following me and I felt intimidated because I was on my own. He should not have hit a woman.

'I want the security guard to be arrested and brought to justice.'

Ayesha's husband Boonake Wongsuriyawattana, 46, raised the case again this week and called for further action to catch the alleged attacker, who has since left the job.

He contacted lawyers at the charity Campaign to Reclaim Social Justice (CRSJ Foundation) in Nonthaburi province for help.

Boonake said: 'My wife was searching for me after I looked for something in my car for a while before she saw the sleeping security guard and woke him up, recording the video to report to his supervisor. 

'They started arguing before the security guard told her to walk to the right side of the building. 

'She did not see him, so she walked back to the left side and saw the security guard following her. 

'My wife was scared and told him to get away from her. 

'The security guard took the opportunity when she was unaware to punch her and knock her down.'

Boonake said the security company did not terminate the alleged attacker's employment and they moved away for safety reasons. They later discovered he had left the job.

Additionally, he claims the company denied liability, citing the incident as a fight between the two and refused to take action.

Boonake said they did not send anyone to check on Ayesha, only sending a basket of fruits as an apology when he intervened. 

Boonake also claimed that Mohammad lacked the required license to work as a security guard after verifying the document from the company with the Metropolitan Police Bureau.

Raphatsit Phattarasirichaisin, vice-president of the CRSJ Foundation, said the charity would pursue litigation against the employer and Mohammad.