LONDON, March 14 (Reuters) - British foreign minister Dominic Raab said it was unacceptable that Iran was pursuing a second case against British-Iranian aid worker Nazanin Zaghari-Ratcliffe.

"It is unacceptable that Iran has chosen to continue the second case against Nazanin Zaghari-Ratcliffe," Raab said in a statement.

"She has been put through a cruel and disgraceful ordeal by the calculating behaviour of the Iranian government. This must end." (Reporting by Elizabeth Piper, writing by William James, editing by Louise Heavens)