Abstract: An adhesive structure comprises a film of adhesive, and support material embedded in the adhesive film. The adhesive material and the support material have a tensile strength in combination which is sufficiently low to allow the adhesive film and the support material to be broken together, in use, by applying a longitudinal force against the resistance provided by the adhesion of the film to an article. The support material has a regular structure which defines lines of relative weakness along which the support material will preferentially break. The support material has a tensile strength which is sufficiently high to prevent the adhesive film from stretching. Thus, the adhesive film and support material will, in use, break together along a weakness line in the support material, but without stretching.