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Hi.
According to the second edition Charlton catalogue they made 1,970 of the 'Fleur' design for the Royal Mint in 2001. The catalogue shows a patchy frit background rather than spaced millefiori, so it is possible that the design varied within the near 200 examples they made. If yours does not say Fleur on the base, it is possible the paperweight and certificate do not match!
Alan