Turner prize 2021; Summer Exhibition 2021 review – there can be no winner

Herbert Art Gallery, Coventry; Royal Academy, London
Social activism not art is the benchmark of a collective-juggling Turner prize. And Yinka Shonibare begins to shake things up at art’s annual pro-am fixtureFirst! That is the exultant boast for this year’s Turner prize – the first shortlist composed entirely of collectives. The first work conceived outside the gallery system. The first time the show has been held in the Midlands, and represents every nation of the UK; certain