The FT's Joshua Chaffin reports from Tory bastion of Chingford in outer London. Long a stronghold of the Conservatives - past MPs include Norman Tebbit and Winston Churchill - Jeremy Corbyn's Labour believe they could win the seat at the next election.<br /><br />► Subscribe to FT.com here: http://bit.ly/2GakujT<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