Sir Hugh Orde, President of the Association of Chief Police Officers, said British police do not "want to be armed" and "guns do not necessarily solve the problem", during an interview with BBC Radio 4.
More top news
Weather: Heavy rain and strong winds in the north
His representatives said Cassidy, who was hospitalised last week, died "surrounded by those he loved."
The company’s recently appointed Chief Executive Dara Khosrowshahi said the breach was made by two individuals outside the company.