► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />Tesco shares fell 10 per cent after the once dominant UK supermarket chain warned on profits for the fourth time this year. Lex's Robert Armstrong and Oliver Ralph discuss what Tesco can do to turn the tide.<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br />Subscribe to the Financial Times on YouTube; http://goo.gl/vUQx5k<br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes
