Was Burnham right to talk about Russian interference in Brexit?

Andy Burnham has started an almighty row by claiming that Russia interfered in the 2016 Brexit referendum. He also says he wants the UK to have closer ties to the EU. The row is one of three major headaches for the prime minister ahead of his crucial budget at the end of October, with migration and Donald Trump’s erratic response to Ukraine and Russia being the other two. Help support our independent journalism at theguardian.com/politicspod