Britain has a productivity problem. German workers take four days to produce what British workers make in five. The FT's Andrew Bounds travels to BAE Systems' new training academy near Preston to see how the company is trying to solve the puzzle.<br /><br />► Subscribe to FT.com here: http://on.ft.com/2eZZoLI<br /><br />► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br /><br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes