Campaigners calling for the release of a London mother imprisoned in Iran held a peaceful protest outside Downing Street. Nazanin Zaghari-Ratcliffe, a 37-year-old charity worker from West Hampstead, was arrested on secret charges and placed in prison in Iran in April as she made her way back to Britain following a family visit. Her daughter Gabriella who was with her at the time had her passport confiscated and was also unable to return home. The toddler is now being looked after by her Iranian grandparents. Nazanin's husband Richard, friends and supporters gathered in Whitehall to sing some of her favourite songs in the hope of urging the government to intervene in her case.