‘Radical Harmony: Helene Kröller-Müller’s Neo-Impressionists’

If you thought the National Gallery answered every question that could possibly be asked about what came after the impressionists in their huge blockbuster ‘After Impressionism’ show in 2023, you thought wrong. Because they’re coming back for another go with ‘Radical Harmony’, which will feature the work of the neo-impressionists, including pointilist masters Georges Seurat and Paul Signac. It’s enough to drive you dotty.