So after dropping his papers and waiting for Starmer to pick them up he says
"So we have a trade agreement with the European Union and it’s a fair deal for both, and it produces a lot of jobs, a lot of income."

Does Starmer say "You stupid ignorant old git. Its the UK not the European Union"?
No, he says:-
“Donald, thank you very much… A really important agreement. And so this is a very good day for both of our countries, a real sign of strength.”

(From the Huffington Post UK edition)

It's the approach you have to take I suppose when talking to a lunatic psychopath with a machine gun.