Police are hunting a British tourist who was seen having sex with a hooker following an all-night drinking bender on Christmas Day in Thai 'Sin City' Pattaya.

The young holidaymaker with short blonde hair sat on a drain cover with the petite local woman in his lap following rowdy parties in the notorious resort on the east coast of Thailand.

She could be seen with her knickers pulled down while pushing back and forth into the holidaymaker's crotch. He also had his boxer shorts around his knees during the 4am romp.

A shocked homeless man who saw the pair branded the tourist a 'disgusting foreigner'. He said he had told local police about the incident and they are checking CCTV while searching for the tourist.

Onlooker Suchat, 50, said: 'They were sitting there doing it for 30 minutes. They didn't care about the cars going by. They could even see me watching them but they were too drunk to care.'

Suchat beckoned over a friend who recorded the pair on his mobile phone. They staggered to their feet after finishing and had a short conversation. They then went their separate ways.

He added: 'I heard the man talking. He was from England. They finished then they talked and he gave her something, I think it was money and she left.

'I am tired of disgusting foreigners treating my city like a rubbish bin.'

Police Captain Yutthapol Boonkerd said police are examining CCTV to trace the tourist. He then faces being arrested for public indecency.

The policeman added: 'We have received information that he could be British but we will not know for sure until we find him. There are lots of cameras in the area, which we are watching back to confirm a crime has been committed at that date and time.

'It should not be difficult to find both of them.'

Military top brass from Bangkok have been trying for several years to clean up the notorious 'sex capital' of the world - branded a modern-day Sodom and Gomorrah - to turn it into a family-friendly resort.

However, they face an uphill struggle against its entrenched 24-hour sex industry and endemic corruption that allows it to continue unabated. The bars - which function as shop windows for prostitutes - along with massage parlours and street workers are also a lucrative part of the tourism industry, which before the pandemic accounted for 21 percent of Thailand's annual GDP, generating 1.8 trillion baht (52.3 billion USD) in revenue.