Today marks the three-year anniversary of Nazanin Zaghari-Ratcliffe’s wrongful imprisonment in Iran on false charges. This sad milestone takes place just days after Mother’s Day, the third Nazanin has spent apart from her four-year-old daughter, Gabriella. Currently living with grandparents in Tehran, Gabriella has been separated from both her parents for over half her life.

This is an injustice no innocent British family should ever have to suffer. An injustice that led to the British government granting this innocent mother from London diplomatic protection, a formal recognition by our government that Nazanin’s treatment fails to meet Iran’s obligations under international law and elevates this to a formal state to state issue. The travesty, as we have all seen, continues to this day.

Nazanin, like myself, is a naturalised British citizen. We were both born in countries with fewer freedoms than we have in the UK. Out of all the countries in the world, we chose to come to Britain, we chose to become British, we chose to build our lives and contribute to society here.

The inscription on my British passport reads: “Her Britannic Majesty’s secretary of state requests and requires in the name of Her Majesty all those whom it may concern to allow the bearer to pass freely without let or hindrance, and to afford the bearer such assistance and protection as may be necessary.”

Nazanin Zaghari-Ratcliffe – in pictures Show all 20 1 /20 Nazanin Zaghari-Ratcliffe – in pictures Nazanin Zaghari-Ratcliffe – in pictures 2018 Nazanin Zaghari-Ratcliffe hugs her daughter Gabriella, in Iran after she was allowed to leave the Iranian prison, she is being held in, for three days. Zaghari-Ratcliffe was arrested during a holiday with her toddler daughter in April 2016. Iranian authorities accuse her of plotting against the government. Her family denies this, saying says she was in Iran to visit family. Free Nazanin Campaign/AP Nazanin Zaghari-Ratcliffe – in pictures Nazanin Zaghari-Ratcliffe with her husband Richard Ratcliffe and their daughter Gabriella. Nazanin is serving a five-year prison sentence for allegedly plotting to overthrow Iran's government. PA Nazanin Zaghari-Ratcliffe – in pictures June 2016 Richard Ratcliffe's daughter Gabriella had her British passport confiscated and was stranded in Iran with her grandparents after her mother Nazanin was jailed. He left left a giant birthday card on the doorstep of the Iranian embassy in central London to mark her second birthday in June 2016. PA Nazanin Zaghari-Ratcliffe – in pictures Nazanin has spent some of her prison sentence in solitary confinement. PA Nazanin Zaghari-Ratcliffe – in pictures Nazanin Zaghari-Ratcliffe with her husband Richard and daughter Gabriella. Family Handout Nazanin Zaghari-Ratcliffe – in pictures July 2016 Richard Ratcliffe delivering a letter of petition with his mother Barbara Ratcliffe and MP Tulip Siddiq, to 10, Downing Street on the 100th day of her detention, on July 12, 2016. Getty Nazanin Zaghari-Ratcliffe – in pictures Supporters of Nazanin Zaghari-Ratcliffe held a vigil outside the Foreign and Commonwealth Office to mark her 707 days in captivity. Getty Nazanin Zaghari-Ratcliffe – in pictures January 2017 Richard Ratcliffe holds a '#Free Nazanin' sign and candle during a vigil for for wife on January 16, 2017. The vigil, being held outside the Iranian Embassy in London marks one year since the Washington Post journalist Jason Rezaian and other US-Iranian dual-nationals were released from prison in Iran. Getty Nazanin Zaghari-Ratcliffe – in pictures Nazanin with her daughter Gabriella before they were detained by Iranian authorities. Change.org Nazanin Zaghari-Ratcliffe – in pictures September 2017 Gabriella, who is three-years-old in this picture, has now spent two years away from her mother. Richard Ratcliffe Nazanin Zaghari-Ratcliffe – in pictures November 2017 Foreign Secretary Boris Johnson meets with Richard Ratcliffe over Nazanin's case. They meet just days after Johnson told a parliamentary committee that she was in Iran "training journalists". WPA Pool/Getty Nazanin Zaghari-Ratcliffe – in pictures November 2017 Actor Emma Thompson braved pneumonia to support Richard Ratcliffe in leading demonstrators before a march in support of Nazanin in November. Reuters Nazanin Zaghari-Ratcliffe – in pictures November 2017 Richard Ratcliffe after the march said: 'It is profoundly moving to see so many people here.' REUTERS Nazanin Zaghari-Ratcliffe – in pictures November 2017 A picture of Nazanin Zaghari-Ratcliffe shown on Iranian state TV as part of a report that made fresh allegations against her. They said she had been recruiting for banned broadcast services, as well as 'opposition cyber teams'. Nazanin Zaghari-Ratcliffe – in pictures December 2017 Iranian president Hassan Rouhani greets British Foreign Secretary Boris Johnson at the presidential office in Tehran, Iran. Johnson visited Tehran to discuss the fate of detained Nazanin Zaghari-Ratcliffe. EPA Nazanin Zaghari-Ratcliffe – in pictures Nazanin Zaghari-Ratcliffe with her daughter Gabriella. PA Nazanin Zaghari-Ratcliffe – in pictures December 2017 Photos of Richard Ratcliffe and his wife Nazanin Zaghari-Ratcliffe on display at their home in north London. Mr Ratcliffe said he believed there was "still a chance" she may be released from an Iranian prison in time for a dream Christmas together. Unfortunately that didn't happen. PA Nazanin Zaghari-Ratcliffe – in pictures February 2018 Richard Ratcliffe delivers a petition and a letter addressed to the Iranian Deputy Foreign Minister Abbas Araghchi to demand her release, at the Iranian Embassy in London on February 21, 2018. He also left support letters for his spouse in the country's embassy, amid a visit by a deputy foreign minister. AFP/Getty Nazanin Zaghari-Ratcliffe – in pictures August 2018 Foreign Secretary, Jeremy Hunt meeting Richard Ratcliffe. Hunt has pledged to do everything possible to secure the release of a charity worker jailed in Iran Jeremy Hunt/PA Nazanin Zaghari-Ratcliffe – in pictures August 2018 Nazanin Zaghari-Ratcliffe hugs her daughter Gabriella, in Iran after she was allowed to leave the Iranian prison, she is being held in, for three days. Zaghari-Ratcliffe was arrested during a holiday with her toddler daughter in April 2016. Iranian authorities accuse her of plotting against the government. Her family denies this, saying says she was in Iran to visit family. PA

When I first read this, I felt safe, I felt protected, I felt free. It never occurred to me that my British citizenship I so cherish would make me a target for foreign governments that had disagreements with mine – until Nazanin was detained in Iran.

If we allow this to happen to one of us, we allow this to happen to all of us. History has proven this to be true – which is why I campaign tirelessly to free Nazanin.

Nazanin and her family have been going through the worst period of their lives these last three years. Nazanin’s husband, Richard Ratcliffe, has been campaigning tirelessly to reunite his family while keeping Nazanin’s hopes up during their brief phone calls from Evin Prison, raising his daughter on Skype and going to work during the day to make sure they have a home to come back to. They need backup, they need caring people to come together and stand by their side, they need us.

And this is what we can do to help.

We need to keep contacting our MPs to make sure our government puts people before profit. At a time when Brexit is dominating the government’s agenda and they’re looking to secure trade deals, we need to make sure our citizens come first. We need to make sure Nazanin’s release and safe return to the UK comes first before any trade deals with Iran.

Calling on the Iranian authorities to release Nazanin immediately and unconditionally is also one way we can effect change, especially if we don’t let up. Sign the Change.org petition and share it with your friends and family.

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Don’t stop showing support for Nazanin and her family. Come along to vigils and protests, including the upcoming event at 5pm today in Fortune Green, West Hampstead where supporters will be hanging messages of what home means to them on Gabriella's favourite tree. Follow the FreeNazanin campaign on Facebook, Twitter and Instagram. Let them know they’re not alone, that we’re here to help, that we’ll be by their side until Nazanin is free.

Richard has some pointers too. Speaking to me, he said: “A wise activist once told me: Love is a verb, not a noun. It is a doing word. What people do for Nazanin and Gabriella – signing petitions, letters to MPs, attending events – has not yet brought them home. But it has kept reminding us that beyond those prison walls there is also a world of care and kindness, that there will also be a different day. I am eternally grateful across the dark times to everyone who has helped keep that alive.”