Boris Johnson may block a Chinese-owned company from purchasing the UK’s largest producer of semiconductors, a senior government adviser has suggested, as they warned Beijing was on the brink of initiating a new “cold war”. Tony Abbott, the former prime minister of Australia recruited by Johnson to advise on post-Brexit trade, said he was heartened by a review being launched into the takeover of Welsh microchip manufacturer Newport Wafer Fab by Nexperia and suggested it meant the process could be paused. Johnson had asked his national security adviser, Sir Stephen Lovegrove, to look into the sale after previously being accused...