Trudeau believes missile downed Ukranian jet

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Evidence from multiple Western sources suggests that the Ukrainian passenger jet which crashed near Tehran on Wednesday was shot down by an Iranian missile. The Canadian Prime Minister, Justin Trudeau, said the incident may well have been unintentional. Our North America correspondent Peter Bowes takes up the story. Taiwan goes to the polls this Saturday to elect a new president. The BBC's Cindy Sui is following the campaigns from the Taiwanese capital of Taipei. British retailers say spending was weak during the holiday period - could it be signs of a shift towards more sustainable shopping habits? We ask Ben Hayman, Managing Partner at the consultancy Given London. In West Africa, the world's two biggest producers of cocoa plan to charge international buyers more for their crop. And social media site Twitter is testing new features to allow users to control who can reply to their posts, or block replies entirely, in a bid to try and prevent bad behaviour on its service. We get reaction from Dr Kate Ferguson, co-founder of Protection Approaches, a charity working to tackle all forms of violence. All this and more discussed with two guests on opposite sides of the Pacific -Tawnell Hobbs, national education reporter at the Wall Street Journal and Simon Littlewood, President of AC Growth Delivered in Singapore. (Photo: Search-and-rescue teams combing through the wreckage of the Boeing 737 flight from Tehran to Kiev. Credit: Akbar TAVAKOLI / IRNA / AFP)