0No, not in the UK - they mean the same thing. "Goodbye" is slightly more formal, and we would tend to say "Bye" rather than "Bye bye" informally. 02br 02br 00The person who told you this might have been thinking of French, where there is a difference between "Adieu" (when one is unlikely to meet again) and "Au revoir" (which literally means 'until we see each other again').
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