Your search for "cast iron made in uk" revealed the following:

Black Cast Iron Hook Hanging Bracket 7 inch - Made in UK — $32

Black Cast Iron Sign 3.5” x 4” "Please Ring" Made in UK — $34

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Black Cast Iron 10” Hook Hanging Bracket 10 inch - Made in UK — $36

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Cast Iron Boot Room Sign 2” x 7.8” Made in UK — $36

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WELCOME Sign Made in the UK — $24