British death toll from Tunisia attack rises to 21 - PM Cameron's spokeswoman

LONDON (Reuters) - The number of Britons confirmed killed by an Islamist gunman in Tunisia last Friday has risen to 21 from 18, a spokeswoman for British Prime Minister David Cameron said on Tuesday. The spokeswoman said the government was trying to confirm the identities of a further nine people killed in the attacks who it thought were British nationals. (Reporting by William James; Editing by Andrew Osborn)