Reuters/Thierry Charlier

• Pound drops sharply on comments from Trump that May's Brexit plans will "probably kill" any US-UK trade deal.

• "If they do a deal like that, we would be dealing with the European Union instead of dealing with the UK, so it will probably kill the deal," Trump told The Sun.

• The pound has fallen more than 0.5% against the dollar on Friday morning.

• You can follow the pound's movements at Markets Insider.

The pound has dropped significantly Friday after President Donald Trump warned that British Prime Minister Theresa May's Brexit plans will "probably kill" any US-UK trade deal after Britain has left the EU.

Speaking to The Sun newspaper during his first official visit to the UK, Trump laid into May's plans to maintain close links with the EU post-Brexit.

"If they do a deal like that, we would be dealing with the European Union instead of dealing with the UK, so it will probably kill the deal," Trump said.

"If they do that, then their trade deal with the US will probably not be made."

Those comments, which could give credence to the wing of the Conservative party who believe May's Brexit plan looks too like the status quo, and possibly hurt her negotiating position in Brussels, have spooked investors in the pound on Friday.

Losses, as of just before 8.40 a.m. BST (3.40 a.m. ET), are hovering at around 0.5% against the dollar — a substantial drop — leaving the pound at around $1.3127.

Here's the chart:

Markets Insider

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• The British pound dives as markets fear the government may collapse

SEE ALSO: 'A real blow': The City of London is furious with the government's Brexit plan for finance