CCS-UK changes are expected to be implemented in late October 2023 to support Phase 1 of the implementation of CDS Exports. It is currently intended to implement these changes around 1 month ahead of phase 2 of Export CDS. 

Phase 1 means that HMRC implement CDA which interlinks CHIEF and CDS with CCS-UK. 

Phase 2 allows for export declarations to start to be made on CDS. So, during this phase export declarations will progressively move from CHIEF to CDS but CCS-UK, by linking to CDA, should be able to handle export declarations on either CHIEF or CDS. 

Phase 3 is where all export declarations are carried out on CDS and CHIEF will be disconnected from CDA/CCS-UK. 

For more information please contact HMRC or Guy Thompson