Image copyright Nazanin Zaghari-Ratcliffe Image caption Nazanin Zaghari-Ratcliffe has been detained in Iran since April 2016 A British-Iranian mother detained in Iran has begun a new hunger strike. Nazanin Zaghari-Ratcliffe was jailed for five years in 2016 after being convicted of spying, which she denies. Her husband, Richard Ratcliffe, said she had stopped taking food…