Technical Guide: Filing ENS to Northern Ireland Through TSS

What the ENS actually is

An ENS is a structured safety and security data message, not a customs declaration. Since 31 December 2025 it terminates in ICS2, replacing the older ICS endpoint.

Filing chain

1. Trader provides consignment data.
2. Carrier holds legal responsibility for submission.
3. Forwarder or intermediary often submits on the carrier's behalf.
4. ICS2 acknowledges and issues a Movement Reference.
5. Vehicle uses the Movement Reference at port check-in. The full data flow is documented in the ENS filing for NI movements reference.

Required data fields

• Consignor and consignee identifiers
• Plain-language goods description
• Transport mode, vehicle, carrier ID
• Routing details
• Security-relevant consignment data
• XI-prefixed EORI

Common technical failures

• GB EORI on a Northern Ireland ENS
• Missing routing data on multimodal legs
• Generic descriptions rejected by validation
• Corrections applied only to downstream customs data, not the source ENS

Downstream integration

Under the simplified customs route, supplementary declarations auto-generate from ENS data. That coupling means a bad ENS produces a bad supplementary. Validate upstream.

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