"Good Riddance Wallace … You humiliated my wife when she was on the show, but you had that part cut out didn’t you?" Stewart wrote in an Instagram post

Sir Rod Stewart has accused Masterchef host Gregg Wallace of humiliating his wife after she was reduced to tears on his show three years ago. At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.

Production company Banijay UK said the 60-year-old was "committed to fully co-operating throughout the process".