During recent talks regarding extending the date when the UK is supposed to leave the EU; it is likely that no deal will be agreed upon by both parties within the current deadline. If this is the case, the EC has released what will happen regarding the implementation and recognition of UK judgments in the 27 Member States who remain a part of the Union.
As a whole, EU regulations will no longer apply to UK judgments, even where the judgment was used from previous EU precedent, even when court proceedings started before the effective withdrawal date. Rather, each EU Member States local laws will be applicable. The UK will continue to impose rulings given in other EU states where any court hearings were initiated before the effective date of withdrawal.