Well I'm from the UK and this was actually a big topic of discussion recently because the Prime Minister was briefed at the National Security Council, made a decision to allow Huawei and then it leaked that she was advised by the NSC not to. So it's not exactly uncontroversial.
In my opinion it's very clear that the Trump admin is willing to just blatantly make up accusations to harm their economic adversaries. We all remember Trump sticking tariffs on goods for "National Security" that were nakedly economic protectionism. Having said that, it's also true that both China and the US are putting backdoors in technology to provide espionage opportunities. The question is though - are we likely to end up on the opposite end of the US in a war, or China? Well at the moment China is definitely more of a threat. So it's more dangerous having the Chinese back doors. That may well change though and the UK should absolutely be developing methods to mitigate all infrastructure attacks like these (and obviously putting our own backdoors in ARM chips where we can).
In my opinion it's very clear that the Trump admin is willing to just blatantly make up accusations to harm their economic adversaries. We all remember Trump sticking tariffs on goods for "National Security" that were nakedly economic protectionism. Having said that, it's also true that both China and the US are putting backdoors in technology to provide espionage opportunities. The question is though - are we likely to end up on the opposite end of the US in a war, or China? Well at the moment China is definitely more of a threat. So it's more dangerous having the Chinese back doors. That may well change though and the UK should absolutely be developing methods to mitigate all infrastructure attacks like these (and obviously putting our own backdoors in ARM chips where we can).