"English channel"? We call it "Ärmelkanal" = verbally: "Sleeve channel". What is the Russian name? "Channel for our nuclear submarines"?
If you watch them with icy eyes they will perhaps send icebreakers. Maybe road salt instead of rust remover will help in this case.
Thought diplomacy is the job between Trump and Putin? "You'll get Greenland and the crown of England, I'll get the Ukraine and rest of the world" and so.
By the way: Do you know that the flags of England and the flag of Denmark once had been the eldest flags of the Holy Roman Empire? One had been the flag in times of peace the other had been the flag in times of war.