U.K. officials said they were particularly concerned that Huawei hasn't implemented companywide cybersecurity practices that it vowed to put in place in 2012, the same year a report from the U.S. Congress labeled Huawei a national security threat.
https://www.marketwatch.com/story/equipment-from-chinas-huawei-has-major-security-flaws-uk-says-2019-03-28