Watercolour slamdown, changing Chanel and Ofili's Grenfell mural - the week in art

Turner and Bonington duke it out, a fashion icon gets a major show and Chris Ofili tackles the burning tower with swirling emotion - all in your weekly dispatch Turner and BoningtonTwo great artists of the Romantic age go head-to-head in this comparison of their intense watercolour landscapes. Wallace Collection, London, 20 September to 21 April