This question has a significant political aspect. The strong stance against Huawei in the USA may be based on commercial considerations as much as security ones. After all, Huawei has recently overtaken Apple to become the Number 2 mobile phone producer in the world after Samsung, and is likely to become Number 1 next year. In contrast with the USA, European countries including the UK has taken a much softer approach. Experts have emphasised the need to base the decision on facts, and primarily technical ones. Politicians appear to have decided that Huawei 5G equipment will be welcomed in UK mobile networks, except in a relatively small but imprecisely defined “core” that is deemed to be particularly sensitive. The UK may be taking a softer stance partly because, in the context of Brexit, we can’t afford to turn our backs on international trade. But our emphasis on basing the decision on technical facts makes good sense.