Ai Weiwei, Julian Assange and graffiti grannies – the week in art

Ai Weiwei and the Celts conquer London. Plus extraordinary outsider artists, endangered buildings and the real Alice in Wonderland – in your weekly dispatch

London fashion week: Burberry and Christopher Kane look to the stars

Christopher Bailey’s show took Burberry street while celebrities looked on, and Kane made light of a dark period in his life

Jeremy Scott at New York fashion week: 60s pop culture through an 80s prism

The designer proves ‘plastic is fantastic’ as he melded his signature pop-art aesthetic with bright, outrageous prints and dresses made with acrylic panels

Tuna and mackerel populations suffer catastrophic 74% decline, research shows

WWF says we risk losing species critical to human food security unless action is taken to halt overfishing and other threats to marine life

Givenchy debut at New York fashion week: diversity wins out over patriotism

Creative director Riccardo Tisci focuses on inclusion in a show that skirts the truly new in favour of a well honed formula uniting high street and high fashion

Luxury Chantilly base chosen for England team hotel at Euro 2016

• Football Association picked site for town’s quiet nature and ease of travel
• Concern over creating suitable training pitch at Stade des Bourgognes