What is NES?
The National Export System is an electronic based system which allows exporters to lodge an export entry with Customs before their goods leave the UK. It is connected to the Custom Handling of Import and Export (CHIEF) system, which records the movement of goods, automatically checks for entry errors.
Exporters submitting declarations must ensure that their goods are cleared on NES before they’re loaded for transport. Clearance can only be obtained through the provision of a goods arrival message in NES that formally enters the goods into customs control (legal acceptance).
NES is currently used for goods movements from the UK to the EU and does not cover exports to NI, which will use the Customs Declaration Service.
Source gov.uk
