Tim Warrillow is the co-founder and CEO of Fever-Tree, the mixer maker extraordinaire. The company was set up in 2003, when Tim and his co-founder Charles Rolls realised there were all this lovely gin sloshing about the place, but a pretty lacklustre selection of tonics. So he trooped off to the Democratic Republic of Congo to find the best ingredients in the world — and just about lived to tell the tale. There were naysayers, of course — there always are. But the product has always spoken for itself. Today, Fever-Tree is the number one tonic in the UK, in the face of some pretty serious competition.