The family of a British billionaire have described him as "one of a kind" after the US Coast Guard said he and four others had been lost aboard the submersible Titan following a "catastrophic implosion".
Hamish Harding was on board the vessel headed towards the Titanic shipwreck along with four others - Stockton Rush, Shahzada Dawood and his son Suleman Dawood and Paul-Henri Nargeolet.
The Titan submersible lost contact with its mother ship Polar Prince an hour and 45 minutes into its journey about 435 miles south of St John’s, Newfoundland.
