EU legislation
Council Directive 87/357/EEC (OJ L192, p49, 11/07/1987) of 25 June 1987 on the approximation of the laws of the Member States concerning products which, appearing to be other than they are, endanger the health or safety of consumers
National legislation
European Communities (Food Imitations)(Safety) Regulations, 1991 (S.I. No. 265 of 1991)
Council Directive 87/357/EEC applies to products which are not edible, but could easily be confused with foodstuffs by their appearance, smell or packaging and it prohibits the marketing, import and manufacture of products that look like foodstuffs but that are not in fact edible.
Some examples of food-imitating products against which the Member States have taken measures can be viewed on the Europa website here.