One in five of us is now employed outside normal office hours, but what does all that nocturnal activity do for our wellbeing? Andrew Shanahan investigates
Despite the annoying perception that personal trainers are superhuman, Andre Fergus enjoys the fact that he can make a difference to his client's lives
The government's 'happiness tsar', Richard Layard, thinks he knows why we're all so miserable - we're overpaid, over-materialistic and lonely. But, he tells Stuart Jeffries, he has a plan to banish the blues in Britain, once and for all