London | Whenever Dr Yasmin Razak sees a healthy patient in their 90s at her London GP surgery, she asks them what they do to look after themselves. "They say every time: 'I make my own food and I don't eat out.' They either have an allotment or grow food in their garden."

The secret to long life looks straightforward, then. Dr Razak's nonagenarians, who also cite regular walks, do not rely on the convenience foods, takeaways and ready meals that so many of us consume today. "It goes back to simple, basic things," agrees Dr Razak, a diabetes expert and adviser to myGP, the NHS-accredited health management app.

The Telegraph London