Dragons’ Den investor Sarah Willingham on what business worries keep Brits up at night

Today marks the launch of a series of “15 Minute Business Fixes” clinics on Heathrow Express trains, which enables its passengers to get advice from successful business leaders. Kick-started by Bombay Bicycle Club owner and Dragons' Den investor Sarah Willingham, we talked to her about the challenges that keep Brits awake at night – and how to overcome them.