Ai Weiwei v Lego – the week in art

The world sticks a primary-coloured middle finger up at the Danish toy company in solidarity with the Chinese artist. Plus Audrey Hepburn, a violent model village and Gilbert & George’s obsession with David Cameron – in your weekly dispatchToshiba Gallery of Japanese Art
The V&A reopens its gallery of art from all periods of Japan’s history: a refurbished and reinvented showcase for one of the most fertile of all artistic traditions.
• V&A, London, from 5 Novem