Jon Snow has revealed he has been diagnosed with dementia. The Channel 4 newsreader, 78, has been privately battling Alzheimer’s disease for three years. It comes five years after he left his long-standing role with the station. The reality of Jon's life with the condition is set to feature in a powerful new documentary produced by Basement Films titled Jon Snow : A Last Big Story. It will air on Channel 4 on June 20. His last broadcast came in 2021 aged 75. He had fronted Channel 4 News