Bake Off star Dame Prue Leith has told Sky News of her older brother’s “absolute agony” before his death, as she campaigns for assisted dying.

Under the Suicide Act 1961, it is a criminal offence to help someone take their own life, punishable by up to 14 years in prison.

Dame Prue, who is patron of Dignity in Dying, said her brother David died in pain from bone cancer in 2012.

“He was spending every three weeks out of four in absolute agony” before his death, she told The UK…