Allegations that a parliamentary researcher has been spying for China will ring alarm bells in Westminster. Rishi Sunak was made aware of the two arrests last night, and I understand decided to go ahead with a face-to-face with the Chinese premier Li Qiang which had been discussed in advance but not confirmed. The issue of Chinese inference was the first thing he mentioned. It could, when details are confirmed, be followed by new rules for MPs on hiring staff. It's certainly evidence of growing concern at the top of government, which critics say is too late. Politics latest: Rory Stewart...