https://www.theregister.co.uk/2020/01/13/mi5_chief_huawei_comments/

The head of Uk's domestic spy agency, MI5, has declared that he has "no reason to think" that Britain's impending decision to use Huawei in the core of 5G mobile networks will harm UK-US relations.

The Financial Times interviewed the top spy, publishing his comments this morning. While Sir Andrew Parker is said to have acknowledged that security fears should not "dominate and dictate decisions", the newspaper pointed out that the National Security Council had few options because of the small number of 5G suppliers on the market.