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Katie Knight of Save E-Cigs (Letters 20 March) says: “Cigarettes, not e-cigarettes, are the gateway to smoking.”

She fails to see that both are simply delivery mechanisms for people to suck in drugs to which they are addicted. This is not natural behaviour for mammals, and it will never be right for children in a restaurant to observe adults doing so, as if it were normal.

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Despite what we may tell them, children acquire their view of acceptable adult behaviour by imitation.

Vicki Green