British boxing great Nigel Benn has revealed on Instagram that one of his brother's has died of Covid-19.

The 56-year-old said Mark Benn had been the "joker" of the family.

It came as the number of UK coronavirus-related deaths climbed by 621 to 4,934 and infections rose by 5,903 to 47,806.

"My brother Mark passed away 2day (Covid-19), as we all were growing up Mark was the joker of the Benn household," he wrote.

"May he Rest In Peace love u Mark.'"

Benn - whose 23-year-old son Conor is a promising fighter with an unblemished record - was one of seven boys but lost his older brother Andy when he fell out of a window aged just eight.

Benn was dubbed the 'Dark Destroyer' for his aggressive style and enjoyed a fierce rivalry with compatriots Chris Eubank and Michael Watson.

Benn was WBO middleweight title in 1990 and then went on to become WBC super-middleweight champion holding the belt between 1992 and 1996 -- losing his crown to South African Thulani Malinga.

He retired from the ring in 1996 after twice failing to take the WBO super-middleweight title from Dubliner Steve Collins.