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A judo champion chased a sex attacker wearing just his shoes and socks before bringing him down with a textbook move.

Jason Bertin left police officers astounded when he chased after the assailant and performed a citizen's arrest.

He then placed him in a submission lock and returned him to the scene of the crime on Boxing Day last year.

The 28-year-old, who has lived in West Ealing for more than two years, was at home asleep on the couch when he woke to hear a woman screaming loudly outside.

Mr Bertin said: "I was sleeping on my couch and I woke up to some serious screaming, I looked out the window and I saw a lady screaming and a man running off."

(Image: Get West London)

The part time bouncer then gave chase wearing only his socks, a T-shirt and jeans, reports Get West London.

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He ran into an estate cleaner who was also looking for the suspect, prompting the duo to get in Mr Bertin's car and search the area.

He added: "I started chasing after him and I did not have time to put my trainers on so I ran down in my socks and I got to the steps.

"I had got to the steps and I started running, I got to the corner of the park and I saw a caretaker, but the guy was young and fit so had a head start.

"So I said let's go and get my car and that's when the chase turned into a driving chase."

After the cleaner recognised the the man outside the Co-operative bank, Mr Bertin leapt from his car and performed an 'Ashi Waza' - a judo move used to take down an opponent.

The move, learned during his years at the Hanwell Community Centre, involves bringing an opponent to the floor by sweeping their leg around them.

Mr Bertin, who couldn't walk for days after the incident, then put him in the back of his car and returned him to police at the scene of the crime.

(Image: PA)

He added: "When I saw him I just pulled up on the pavement and I just got out of the car and told him 'you're under arrest'.

"I used to do judo so I knew how to do takedowns.

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"I used my left hand to grab his right arm, then right hand holding his collar, right leg behind his then I pushed forward with my arms and pulled his leg back.

"He fell to the ground and then I had him in a submission lock.

"When I pulled up outside my house the police were outside with the lady and they did not see him in the back until he hopped out.

"They were quite astounded."

Akram Musa is to be sentenced on April 18 after he pleaded guilty to a charge of sexual assault on a woman at Westminster Magistrates Court on December 28 2015.

The unemployed 21-year-old, of Ealing, was arrested on Boxing Day last year at the Sherwood Close Estate in West Ealing.