There are big changes afoot in Cuba. The US embassy has reopened in Havana and decades of hostility with Washington are gradually being consigned to the past.

But one thing that hasn't changed in all that time is Granma, the Cuban government's state-run newspaper. The paper hasn't altered its style or message since it was first set up by Fidel Castro's revolutionary government at the height of the Cold War.

But how will the paper survive in a 21st Century media world? In Havana, Will Grant gained rare access to the newspaper's offices.