The H3N2 strain and its growth rate

The NHS is warning of an unprecedented flu season - we check what the numbers say.

Is there really a mass exodus of Brits leaving the UK due to Labour tax policies? We look at the latest emigration figures.

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?

Plus - why the US economy can’t grow at 25 percent a year.

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