HOW TO LIVE TO 100

Channel 4, 6.45pm

Jon Snow’s career away from the news desk has got off to an auspicious start with this entertaining, informative two-part documentary, Judy Parfitt in Sunday night drama Call the Midwife concluding tonight as he meets a 96-year-old dietician who puts his long life down to veganism. Elsewhere in the latter’s community of Seventh Day Adventists, the benefits of a day away from technology are apparent, before Snow heads to Nagano in Japan, where life expectancy is the highest in the world and the elderly routinely