Mario Heller has been named as ‘Press Photographer of the Year’ at this year’s prestigious Swiss Press Photo awards for his work on Narva, a city on the border between Estonia and Russia which is navigating the cultural and historic links with its giant neighbour since Russia’s invasion of Ukraine.

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Seventeen year old Maria Morozova, a member of Kaitseliit, or the Estonian Defence League, a voluntary paramilitary defence organisation under the Ministry of Defence. Narva, Estonia. © Mario Heller/Panos Pictures