Five Britons including a father and his teenage son who died when a whale-watching boat sank off the coast of Canada have been named.

David Thomas, 50, and his 18-year-old son Stephen, from Swindon, Wiltshire, were among five Britons who died after the boat overturned near Vancouver Island on Sunday.

Nigel Hooker, 63, from Southampton, and ex-pats Jack Slater, 76, and Katie Taylor, 29, were also killed.

Matt Brown, regional coroner for the Island Region of the British Columbia Coroners Service, said Mr Slater lived in Toronto and Ms Taylor lived in the ski resort of Whistler.

He said none of the five who died were wearing life jackets although they were available.

"Life jackets were on board. I believe that this vessel can occupy up to 50 individuals. There were 27 on board and there were life jackets available for all of them."

Mr Brown said the boat had two decks, adding: "The information we have is that they were at the top of the boat."

He said the top deck was open whereas the lower deck was enclosed by windows.

A 27-year-old man from Sydney remains missing, he said.

The stricken boat, run by local tour firm Jamie's Whaling Station, got into difficulty eight miles from the small town of Tofino, around 150 miles west of Vancouver.

Following the incident the company's owner, Jamie Bray, said passengers on the boat were not required to wear life jackets.

"On larger vessels we're not required to have the passengers wear the life jackets. On smaller open boats they are," he said.