Downing Street have worked hard to brush away the tennis and wine loving PM’s ‘chillaxing’ image, especially after a No. 10 aide once revealed Dave spent “a crazy, scary amount of time playing Fruit Ninja on his iPad”. They won’t be pleased to hear then that the PM has discovered another addictive iPhone game. Travelling back from an tech event in Germany recently, digital Dave learnt a few things on the plane from British entrepreneur Ben Medlock, who invented the SwiftKey app: “I introduced him to cult hit Flappy Bird. I’m proud to report he didn’t beat my score.” Practice makes perfect…