What date did warnings start appearing on snuff in the UK?

Hi, wondering if any one can help me with this. I bought 3 old tins of F&T from Ebay that dont have a tobacco warning on so I am guessing they must be about 10 years old?

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Oh so probably not as old as I thought then. The tins look modern design (from the picture) only without the warning on the bottom third of the tin.