The Border and Protocol Delivery Group is aware of possible delays when moving goods under transit/CTC into Calais-port or Dunkerque where the Office of Transit included on the declaration is different to the actual port of arrival in France. e.g. Calais-port was included on the declaration but on check-in at Dover, the haulier decided to take a crossing that arrives in Dunkerque.
This may cause delays on arrival in France and be routed to orange lanes to allow the completion of the Office of Transit formalities through emergency procedures to address the error message sent between the 2 NCTS systems.
HMRC met with French Customs today to work on further solutions and hope to share outcomes as soon as they are confirmed.
Guidance is available here.