This is the shocking moment a British tourist was knocked out by a strip club bouncer in Thailand.

The tourist, 62, had reportedly been drinking at a nearby bar before trying to enter the lap dancing venue in 'Sin City' Pattaya at around 11:30 pm on March 2.

However, he was blocked at the entrance by tattooed Thai guard Sarawut, 33, who said he refused to let him in due to his aggressive behaviour.

CCTV footage shows the Brit stomping toward the bouncer as they squared up in an alleyway along the infamous red-light district Walking Street.

Sarawut then threw a powerful right hook that instantly knocked the holidaymaker unconscious, leaving him bleeding while splayed out on the pavement.

Medics later arrived to give the Englishman first aid before rushing him to Bangkok Hospital Pattaya for treatment.

Sarawut today filed a report at the Pattaya City Police Station. He claimed the British tourist had kicked him in the groin first for refusing him entry at the strip club.

A police spokesman said: 'We have not charged anyone because we are waiting for the British tourist to be discharged from the hospital. We will summon both sides to the police station for questioning.'

Atthapol Promuthai, a security guard who witnessed the incident, said: 'The tourist appeared to be picking a fight with the bouncer before he was knocked out. I saw the bouncer walking away from him to avoid him, but the tourist kept following him into the alley across the street.

'The bouncer appeared to have lost control of his temper and punched the man in the face before running away.'

In May year, a British tourist was kicked in the head and knocked unconscious by bouncers on the nearby Soi 6 street, leading to concerns the destination had descended into a 'Sodom and Gomorrah'.

Sergeant Major Arthon from the Pattaya City police station, said that the three security guards had since been warned about their conduct but they had not been arrested or charged.

Former fishing village Pattaya became popular with American troops on 'rest and relaxation' breaks in the 1950s and 1960s when the U.S. military had bases in Thailand while fighting Communism in Vietnam. Rural families are said to have even dressed their sons as women to cash in on the gold rush.

The handful of bars in the coastal town quickly grew and it is now the world's biggest sex holiday destination, with round-the-clock prostitution and drugs - a modern-day Sodom and Gomorrah rife with crime and debauchery.

Government chiefs have attempted to clean up the city but regular violence, depravity and claims of corruption continue to blight its reputation.