BBC: Briton Gillian Gibbons has been imprisoned for 15 days in Sudan - a country with some of the world's worst prisons, according to campaigners.
Justice Africa, a UK-based research group, said even a Sudanese person, used to the hardship of daily life, would find conditions hard.
A US State Department report described the jails as "harsh and overcrowded".
However, the Sudanese authorities have not confirmed where Mrs Gibbons will serve her sentence. >>>
Mark Alexander
