<p>The NHS is warning of an unprecedented flu season - we check what the numbers say.</p><p>Is there really a mass exodus of Brits leaving the UK due to Labour tax policies? We look at the latest emigration figures.</p><p>We take a look at the prison service’s curious habit of letting prisoners out early – or keeping them in for too long - is there a trend?</p><p>Plus - why the US economy can’t grow at 25 percent a year.</p><p>Presenter: Tim Harford Reporter: Nathan Gower Producers: Charlotte McDonald, Katie Solleveld, Lizzy McNeill and Tom Colls. Production co-ordinator: Maria Ogundele Sound mix: Gareth Jones Editor: Richard Vadon</p>