Yeah im UK as well, I don't think it's really about national security, regardless I don't mind america doing what they like with private companies but the fact it affects the rest of the world is a bit mad really.(Appreciating I am from the UK, when the main debate is occurring in the US)
I have little doubt it will cause issues for a period of time.
They've ultimately labelled it under national security, so i'd imagine it's going to have an impact, as large businesses will ultimately have to follow domestic law, and not something they will retract from easily without a big change.
Either way, the general public will likely never know if there is real legitimacy to the security claims, or if it is just a disguise for more political warfare, either way, I cannot imagine the risk of national security being retracted from quickly or easily.
But I also believe it's in the best interest of the industry and the Chinese manufacturers to try and sort it out, as they will want to really get into the western hemisphere, even if it means making some changes. That's my thought process anyway.