Will life sciences lead Britain towards a new economic future? Brexit's causing uncertainty. But as Ruth Alexander discovers, there's a dynamic 'golden triangle' now linking medical and other cutting edge research at Oxford and Cambridge universities with London's political and financial power. The government's putting this at the centre of its vision for a transformed economy. So what's behind all this, and can this sector live up to the ambition?

Producer: Chris Bowlby
Editor: Penny Murphy