Is everybody happy?

The expected answer to the above question, especially when asked by performers onstage to the audience in front of them, is of course an "enormous yes". But if we are being honest presumably the answer may from time to time be more nuanced, or even, unfortunately, negative. The BBC recently broadcast a series trying to unravel the 'happiness formula'. The series has ended, but from its website you can still read a number of articles and watch several videos analysing the causes of happiness and unhappiness. Well worth a virtual stop!