Mary Berry was reduced to tears as she remembered the death of her 19-year-old son William during the 2016 BBC documentary, The Mary Berry Story.MORE: Alex Jones sent beautiful gift from Mary BerryThe former Great British Bake Off judge, who is now a patron of Child Bereavement UK, visited William's grave on the programme, and spoke about how he died in a car crash while home from university in 1989.Revealing that she had made him a roast dinner on his return home as a treat, she said in 2016: