Most common company mistakes in UK–EU customs clearance: ENS, GMR, origin

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1. An ENS lodged too late, incomplete or in the wrong system

The safety and security declaration (ENS) must be lodged before the goods arrive. For Great Britain the Safety and Security GB (S&S GB) service is used – not CDS – and for Northern Ireland and the EU the ICS2 system. The minimum times for entry into GB (GOV.UK): ro-ro ferries at least 2 hours before arrival, road traffic through the Channel Tunnel 1 hour before arrival at the Coquelles terminal, and maritime containers on longer routes 24 hours before loading at the departure port, while for short sea journeys (including from ports on the English Channel, the North Sea and the Baltic – most EU–UK routes) it is 2 hours before arrival, containers included. A transit declaration does not replace the ENS: from 1 June 2026 a transit declaration lodged in Great Britain (NCTS 6) may not include ENS data – declarations with security type 1 or 3 are rejected (HMRC, rule GB002), so the ENS for entry into the UK is filed separately with HMRC in S&S GB. Details: what is an ENS and when is it required and S&S GB or ICS2.

2. Incorrect tariff classification

A wrong code means a wrong duty rate and sometimes a missing licence or tariff measure. Classify using the official tools: the UK Trade Tariff for imports into the UK and TARIC for imports into the EU (TARIC – how to check the code). If in doubt, you can get a binding decision: in the UK an Advance Tariff Ruling (ATaR) for businesses with a GB EORI number, and for trade with the EU and Northern Ireland a Binding Tariff Information (BTI) decision. GOV.UK describes such a decision as generally valid for 3 years (GOV.UK).

3. No proof of origin when claiming the TCA preference

The zero duty rate under the TCA applies only to goods with preferential origin. The importer can rely on a statement on origin made out by the exporter or on their own knowledge of the origin of the goods; an EU exporter needs a REX number if the total value of consignments exceeds EUR 6,000 (GOV.UK). An EUR.1 certificate is not proof in EU–UK trade. Buying goods in the UK does not mean UK origin – see UK-EU rules of origin and statement on origin and REX.

4. A wrong or missing GMR

A GMR is needed when you move goods through ports that use GVMS – both for imports into GB (from the EU and from Northern Ireland) and for exports from GB to the EU. The carrier will not let the vehicle embark without a valid GMR, which means delay (GOV.UK). Use the checklist in GMR errors before the port.

5. Mixed-up roles and scope of authorisation

Under indirect representation the agent is the declarant and the importer is also a debtor; the debtors are jointly and severally liable (Articles 77(3) and 84 of the Union Customs Code). Under direct representation the agent acts in the name and on behalf of the importer, who is the declarant and the debtor, and the agent does not as a rule become a debtor. Agree the scope of the authorisation before the first clearance: direct and indirect customs representation.

6. A mismatch between the invoice value and the declaration

The customs value is based on the transaction value – the price actually paid or payable for the goods, adjusted where necessary for the elements in Article 71 UCC. Differences between the invoice, the waybill and the declaration are a frequent reason for questions from customs. You can make a first estimate with the duty and VAT calculator.

7. Keeping documents for too short a time

In the EU, documents and information relating to a declaration must be kept for at least 3 years (Article 51 of the Union Customs Code), and in the UK, according to HMRC guidance, goods declared to HMRC for 4 years and VAT records for at least 6 years. In the EU the debtor is not notified of a customs debt after 3 years from the date it arose, and where it arose from an act liable to criminal proceedings, that period is extended to between 5 and 10 years under national law (Article 103 UCC).

How to reduce the risk

Before every clearance, check the classification, the value, the proof of origin and that all declarations (ENS, GMR) are in place. The roundup 10 common customs documentation mistakes in EU–UK trade can also help. Would you like us to review your documents before shipping? Get in touch.

Frequently asked questions