What should you never say to a British person?

I noticed a couple of things you should never say to a British person. Including Megan and harry are good people. Royalty is waist of money. Milk in tea is gross. The NHS service is the worst in Europe. Immigrant are humain being who deserve a chance in life. Has everyone else noticed anything to has angered a British person.

What should you never say to a British person?
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