You'll hear it in various places. In my part of the UK (the south-east), it's most commonly heard in semi-joke phrases like "On me 'ead, son" - it refers to soccer and is usually said in what would once have been considered a "lower class" or "common" accent.
AtIn what part of England do theypeople say/pronounce, for example, "my head" as "mi head"?
I would write the pronunciation as "me", rather than "mi".
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