Despite independence, we really have interdependence -- in a great many ways. There's also rivalry.
Slang and idioms flow across the Big Pond in both directions.
On this American Independence Day I hereby declare that I detest "spot on" and I absolutely refuse to say it or write it.
However, I recently learned "chuffed" and I like it a lot. I will do my best to spread it around the colonies.
But I will never forgive the Brits for destroying the original Library of Congress when they burned Washington D. C. in August, 1814.