One person died and several others were injured when a flight from London to Singapore hit severe turbulence. Singapore Airlines says flight SQ321 was headed from Heathrow on Monday when it encountered the turbulence. The airline says the Boeing 777-300ER diverted to Bangkok and landed about 3:45 p.m. local time at Suvarnabhumi Airport. There were a total of 211 passengers and 18 crew on board. “Singapore Airlines offers its deepest condolences to the family of the deceased,” the company said in a statement on social media. It added that it was working with the local authorities in Thailand to…