Pressure to support Tory position on contentious issues such as colonialism âcancels honest debateâ Sir Charles Dunstone quit as chair of Royal Museums Greenwich after a trusteeâs reappointment was vetoed. Photograph: Chris Jackson/Getty Images Sir Charles Dunstone quit as chair of Royal Museums Greenwich after a trusteeâs reappointment was vetoed. Photograph: Chris Jackson/Getty Images Sun 9 May 2021 05.15 EDT Ministers are facing mounting anger over claims that they are deliberately stifling âhonest and open debateâ as part of a culture war, with a concerted campaign to purge dissenting voices from positions in Britainâs leading museums, galleries and major cultural bodies.