This chapter examines revocation as a reason for removing a mark from the register and the grounds for revocation as set out in section 46 of the Trade Marks Act 1994. It begins by discussing the first ground on which a mark may be revoked: ‘non-use’ (the trade mark has not been used for five years following the date of completion of the registration). It considers the relevant period of non-use and proper reasons for non-use, along with the issue of rewriting the specification with respect to goods and services. The chapter then looks at the second ground for the revocation of trade marks: if the mark has become the ‘common name in the trade’ (that is, generic marks). The final reason for revocation is if the mark has been used in a way that misleads the public (that is, deception is involved).