The shape of the post-Brexit export documentation and registration process will only be known after the UK and EU27 have agreed on their future relationship. We will update you as soon as we are made aware of any changes to export registration and documentation.
To complicate things further, a new Customs Declaration Services programme is being introduced to replace the current Customs Handling of Import and Export Freight (CHIEF) system. This should provide a state-of-the-art system covering future customs requirements for import and export registration and documentation to and from non-EU countries. It is essential that you understand how this new system will affect importers and exporters and how it will impact on the UK's ability to develop new markets.