UK foreign secretary Boris Johnson has said he recognises the sense of 'grief and alienation' felt by those who wish to stay in the EU, but said it would be a 'disastrous mistake' to 'derail' the UK’s departure from the bloc.<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
