Since 1 January 2021, EU trademarks (EUTMs) are no longer protected trademarks in the UK due to Brexit. In light hereof, the UK IPO created a comparable UK trade mark for all right holders with an existing EUTM. Consequently, you might now have 2 national UK trademarks. One comparable UK trade mark and an international trademark registration designating the UK. To solve this duality, the old principle of replacement comes into play, but is this effective? Is replacement useful? What are the advantages and disadvantages of this principle?