Twenty passengers, including six Britons, remain in intensive care after a Singapore Airlines flight from Heathrow encountered severe turbulence. Singapore's prime minister has promised a thorough investigation following the death of 73-year-old Geoffrey Kitchen, who suffered a suspected heart attack. A total of 79 passengers and six crew members were injured. The turbulence occurred over Myanmar's Irrawaddy Basin, causing the plane to drop 6,000 feet. The airline’s CEO apologised for the traumatic experience.