Boris Johnson the British Foreign Secretary speaks about his recent trip to Latin America, and the unique opportunities the region presents for the UK. He said never have did he feel such a sense of mystery as he did last week when he gazed at the Pacific from the coast of Latin America – and we looked at each other, as the poet puts it, with a wild surmise. The mystery was what had taken us so long. Why was I the first Foreign Secretary to visit Peru for 50 years? How had we waited 25 years to go to Argentina,…