https://www.reuters.com/article/us-huawei-security-britain/huawei-is-a-risk-so-britain-must-change-course-on-5g-ex-mi6-spymaster-says-idUSKCN1SM0RW

China's Huawei poses such a grave security risk to the United Kingdom that the government must reconsider its decision to give it a limited role in building 5G networks, a former head of Britain's MI6 foreign spy service said on Thursday.