John Bolton in UK to meet Johnson and Brexit hardliners

US security adviser expected to urge tougher line on Tehran and Chinese tech firm Huawei John Bolton, the hawkish US national security adviser, has started two days of meetings in London with key figures in Boris Johnsons government as the US pitches to steer a post-Brexit UK further away from Europe on a range of issues including trade, the role of the Chinese technology firm Huawei. Bolton is the most senior Trump official to visit since Johnson became prime minister, …