How to beat insomnia

“I want to live to 100; I am working on that. I’m helped by 10 hours’ sleep a night and a glass of wine. I’ve always slept like a log.” That’s Michael Heseltine, the Tory grandee, speaking to The Times last October. Lord Heseltine has seven years to go until he hits his tonne. To those of us slightly further away from centenarian status, getting a good night’s sleep and draining a glass of plonk, while undeniably appealing, might seem rather elementary advice for ensuring a…