Can Trump's threat to end all investments in the UK be the red flag Parliament needs to ban him from the country?

He’s an idiot. And he can’t/won’t carry that out.

If Trump pulls his personal investments from the UK, there will be a collective sigh of relief from Penzance to John o’Groats.

They have plenty of reasons to ban him already.

So what if he does?

But, doesn’t Trump threatening the entirety of the UK actually increase the chances of Parliament voting to ban him?

It’s non-binding. If the US was similarly threatened, I would fully expect the entire congress to vote to ban them as a matter of national pride.
Pull out.
So what?

Maybe the EU can follow suit.

What a dolt.

He’s acting like a 3 year old. He can cry that they don’t like him and then take him ball and go home. If the US elects Trump they will get what they deserve.

Totally agree, @cazzie. Great comment.

The best course for those of Her Majesty’s government is to watch Trump without comment. The truth is that there is no honorable outcome in allowing yourself to be drawn into an egg throwing contest by a fool. In addition, the ridiculous prospect of Trump as President is obviously just fine with so many Americans, that the fool might just make it. And then what?