BUZZ-Standard Chartered, HSBC slide as Hong Kong protests escalate

** Asia-exposed banks Standard Chartered and HSBC hit by intensifying protests in Hong Kong over Chinese extradition bill

** London-listed shares in Standard Chartered down 2.9%, 2nd biggest FTSE 100 fallers, and set for their worst day in nearly three months

** HSBC's London-listed shares fall 1%

** Protests against an extradition bill that would allow people to be sent to mainland China for trial turned to violent chaos

** A Standard Chartered analyst says "general uncertainty" over Asia is likely the reason for the fall, which comes after a surprisingly strong performance year-to-date (up 12%) (Reporting by Helen Reid: editing by Josephine Mason)