Simon Cheng: 'We need to fight for democracy in Hong Kong and China'

One year ago, pro-democracy street protests began in Hong Kong. At the time, Simon Cheng was an employee of the British consulate in Hong Kong. Last August, he was arrested in mainland China and, he says, interrogated and physically abused. A year on, Mr Cheng is seeking asylum in the UK, and China is about to impose a new national security law in Hong Kong. Will anything stop Beijing imposing its will on Hong Kong?