China has issued its most pointed threat yet to pro-democracy protesters in Hong Kong, warning that it has “enough solutions and enough power to swiftly quell unrest” should it deem the situation “uncontrollable”. Speaking to international media in London on Thursday, China’s ambassador to the UK, Liu Xiaoming, also accused some British politicians of harbouring a “colonial mindset” in their interventions. On Wednesday satellite images showed hundreds of armoured paramilitary police vehicles parked in a stadium in the southern Chinese city of Shenzen, close to the Hong Kong border.