WHISTLE WATCH: Nigel Owens' biggest mistake

WATCH as retired referee Nigel Owens goes through viewers' questions once again.

He looks at the week's biggest moments, including red cards in the Premiership and Super Rugby's new red card rule used for the first time after a Izaia Perese spear tackle.

He also tells us about his biggest mistake and addresses the elephant in the room' - the controversial charge-down incident in the Exeter versus Northampton Premiership game.

Source: @WorldRugby