FT leader writer Sebastian Payne visits Stoke-on-Trent, which faces a by-election in late February, to test his view that Brexit has badly damaged Labour’s electoral chances as Ukip claims it is the authentic voice of the working class. <br /><br />► Watch 'Article 50: defusing the Brexit time-bomb: https://youtu.be/lYdGAAYW_EI<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 />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes