Reduce your heating energy use by keeping your home at a more even temperatture 24/7 - ?

http://www.telegraph.co.uk/finance/property/advice/9831697/Jeff-Howell-can-keeping-the-heating-on-low-all-day-reduce-costs.html

Is it better to keep your home at a relatively high minimum temperature all the time using your central heating, or should you only heat your home when you're in during the day time?

It's the golden question, and perhaps unanswerable - at least as a generalisation, but the article suggests the former is better.