Britain’s new army chief recently said Britain must be ready for war in three years. Where are the biggest threats coming from, what are our current weaknesses, and how can we best prepare? To find out, Gavin Esler speaks to the Economist’s defence editor Shashank Joshi.    We are sponsored by Indeed. Go to Indeed.com/bunker for £100 sponsored credit.   www.patreon.com/bunkercast   Written and presented by Gavin Esler. Produced by Eliza Davis Beard. Audio production by Tom Taylor. Managing Editor Jacob Jarvis. Group Editor Andrew Harrison. Art by James Parrett. Music by Kenny Dickinson. THE BUNKER is a Podmasters Production   www.podmasters.co.uk Learn more about your ad choices. Visit podcastchoices.com/adchoices