• Judges include actor Noma Dumezweni; former Vanity Fair editor Tina Brown

• Sixteen courageous individuals and organisations who fight for freedom of expression in every part of the world.

A Zimbabwean pastor who was arrested by authorities last week for his #ThisFlag campaign, an Iranian Kurdish journalist covering his life as an interned Australian asylum seeker, one of China’s most notorious political cartoonists, and an imprisoned Russian human rights activist are among those shortlisted for the 2017 Index on Censorship Freedom of Expression Awards.

Drawn from more than 400 crowdsourced nominations, the shortlist celebrates artists, writers, journalists and campaigners overcoming censorship and fighting for freedom of expression against immense obstacles. Many of the 16 shortlisted nominees are regularly targeted by authorities or by criminal and extremist groups for their work: some face regular death threats, others criminal prosecution or exile.

“The creativity and bravery of the shortlist nominees in challenging restrictions on freedom of expression reminds us that a small act — from a picture to a poem — can have a big impact. Our nominees have faced severe penalties for standing up for their beliefs. These awards recognise their courage and commitment to free speech,” said Jodie Ginsberg, CEO of campaigning nonprofit Index on Censorship.

Awards are offered in four categories: arts, campaigning, digital activism and journalism.

Nominees include Pastor Evan Mawarire whose frustration with Zimbabwe’s government led him to the #ThisFlag campaign; Behrouz Boochani, an Iranian Kurdish journalist who documents the life of indefinitely-interned Australian asylum seekers in Papua New Guinea; China’s Wang Liming, better known as Rebel Pepper, a political cartoonist who lampoons the country’s leaders; Ildar Dadin, an imprisoned Russian opposition activist, who became the first person convicted under the country’s public assembly law; Daptar, a Dagestani initiative tackling women’s issues like female genital mutilation that are rarely discussed publicly in the country; and Serbia’s Crime and Corruption Reporting Network (KRIK), which was founded by a group of journalists to combat pervasive corruption and organised crime.

Other nominees include Hungary’s Two-tail Dog Party, a group of satirists who parody the country’s political discourse; Honduran LGBT rights organisation Arcoiris, which has had six activists murdered in the past year for providing support to the LGBT community and lobbying the country’s government; Luaty Beirão, a rapper from Angola, who uses his music to unmask the country’s political corruption; and Maldives Independent, a website involved in revealing endemic corruption at the highest levels in the country despite repeated intimidation.

Judges for this year’s awards, now in its 17th year, are Harry Potter actor Noma Dumezweni, Hillsborough lawyer Caiolfhionn Gallagher, former Vanity Fair editor Tina Brown, designer Anab Jain and music producer Stephen Budd.

Dumezweni, who plays Hermione in the stage play Harry Potter and the Cursed Child, was shortlisted earlier this year for an Evening Standard Theatre Award for Best Actress. Speaking about the importance of the Index Awards she said: “Freedom of expression is essential to help challenge our perception of the world”.

Winners, who will be announced at a gala ceremony in London on 19 April, become Index on Censorship Freedom of Expression Awards Fellows and are given support for their work, including training in areas such as advocacy and communications.

“The GreatFire team works anonymously and independently but after we were awarded a fellowship from Index it felt like we had real world colleagues. Index helped us make improvements to our overall operations, consulted with us on strategy and were always there for us, through the good times and the pain,” Charlie Smith of GreatFire, 2016 Freedom of Expression Awards Digital Activism Fellow.

This year, the Freedom of Expression Awards are being supported by sponsors including SAGE Publishing, Google, Vodafone, media partner CNN, VICE News, Doughty Street Chambers, Psiphon and Gorkana. Illustrations of the nominees were created by Sebastián Bravo Guerrero.