This week Colin Window, a bridge officer on the Woolwich ferry in east London, travels to Dhaka, Bangladesh, to work as a ferryman on the Buringanga river. More than 6,000 miles from the river Thames, the Buringanga is one of the most congested waterways in the world, rammed with small wooden passenger boats, barges, cargo ships and huge ferries. Living and working with 76-year-old skipper Mr Loteef, he finds out what it is like for some of the poorest people on the planet. He stays in one of the city’s many slums, among people who often live on less than a pound a day; meets street children and take his life in his hands as he ventures out amongst the giant ferries and barges.