Two brothers have been charged with murder after the captain of a pleasure boat died following a row.
Michael Reed, 67, from Barking, died in hospital on Saturday night.
Earlier in the evening officers had been called to reports of an argument on a vessel at Tower Pier, on the River Thames, in central London.
Andrew Liddard, 21, of Harlow, Essex, and his brother Christopher, 26, of Hoddesdon, Herts, are due in court later charged with murder and affray.
Scotland Yard said Mr Reed was a senior crew member of the City Cruises boat The Millennium of Peace.