National Gallery in London bans liquids after activists’ art attacks

Only baby formula, expressed milk and prescription medicines will be allowed with large bags also prohibited under new measuresThe National Gallery has announced a raft of increased security measures after protesters attacked paintings including Vincent van Gogh’s Sunflowers, John Constable’s The Hay Wain and Diego Velázquez’s The Rokeby Venus.From Friday morning there will be a ban on bringing into the London gallery any liquids except for baby formula, expressed milk o