If news is something you do not expect, then police Sub-lieutenant Wanchalerm Ubumrung is it. Thai papers yesterday devoted headlines to the fact that the officer, the son of outspoken opposition politician Chalerm Ubumrung, actually broke up a bar fight rather than starting one. Sub-lieutenant Wanchalerm and his brother Art-harn are notorious for a string of hotly denied incidents in some of Bangkok's and Phuket's more expensive establishments. If you believe their protestations of innocence, the Versace-clad crime-busters must be some of the unluckiest drinkers in Bangkok. Whenever they go near a public house or nightclub to unwind, chairs seem to fly out windows, all-in brawls break out at the bar or young women are beaten up later in the car park. On Saturday, it was no different, except this time Sub-lieutenant Wanchalerm emerged smelling of roses for simply doing his job. Hemajak Bunnag and Pornchai Sribenjarat circled each other in the car park of the Taurus Pub at 3am on Saturday and started - according to the Nation newspaper - 'exchanging negative facial expressions'. Punches flew until Sub-lieutenant Wanchalerm stepped forward. 'Why are you fighting? We are the same class of people,' he shouted above the crowd. He then escorted both men to a nearby police station, where they agreed to end hostilities and pay a token 200 baht (HK$42) fine. It is not the first time Sub-lieutenant Wanchalerm has claimed the moral high ground. Two weeks ago, he was seen tut-tutting in the public gallery of Parliament as his father, now deputy leader of the New Aspiration Party, led the censure debate against the ruling Democrat Party.