Our physical archive is conserved at the National Photography Collection in the National Science and Media Museum, Bradford. You’ll find a wealth of letters, posters, flyers, and original artworks that illuminate Impressions' unique contribution to exhibiting photography in the UK. The archive is currently not digitised, but can be visited in person by appointment at the Insight Centre, National Science and Media Museum. It’s free, but you must book in advance. https://collection.sciencemuseumgroup.org.uk