LYON (euronews) — Nazanin Zaghari-Ratcliffe, the British woman jailed by Iran on spy charges, has begun a new hunger strike at Tehran’s Evin Prison. The protest came as her daughter Gabriella marked her fifth birthday, separated from both her mother and father.

The 40-year-old aid worker was arrested in April 2016 and has always maintained her innocence. Meanwhile, Gabriella is being cared for by her grandparents in Iran.

Richard Ratcliffe and a crowd of supporters gathered outside the Iranian embassy in London to sing Happy Birthday to his daughter. He acknowledged that it was “not a good time to be doing a hunger strike”.

Britain’s Foreign Minister Jeremy Hunt, who is campaigning to become the UK’s next prime minister, met Mr Ratcliffe on Saturday. In a Tweet, he urged Iran to “do the right thing” and “let this innocent woman home”.