ENS, GMR and BTOM — The Basics of the UK Border Security System

ENS, GMR and BTOM — The Basics of the UK Border Security System for Drivers and Freight Forwarders

Since 2021, road transport between Poland and the UK has been subject to a multi-layered system of border controls. The three abbreviations you need to know by heart are ENS, GMR and BTOM. Without understanding how they relate to each other, it is hard to manage day-to-day logistics on this route efficiently.

ENS — Entry Summary Declaration

ENS is a safety and security declaration lodged with UK Border Force (HMRC) before a vehicle carrying a load enters UK territory. It is the equivalent of the European ECS (Export Control System) — but on the UK side.

Who lodges the ENS?

The obligation to lodge the ENS rests with the carrier or their authorised representative (a customs agency). In practice, for Poland-UK road transport, the ENS is lodged by a customs agency acting on behalf of the carrier.

When should the ENS be lodged?

• Road transport (RoRo): minimum 1 hour before arrival at the UK port
• Rail transport: minimum 2 hours
• Sea transport (container): minimum 24 hours before loading at the port of departure

Good practice: Lodge the ENS at the moment the goods are loaded — not "on the way" to the port. This removes the risk of missing the deadline and gives you time to correct any errors.

What does the ENS contain?

The ENS must contain the carrier's details, the vehicle and trailer registration number, the route (port of departure → UK port), detailed information about the goods (description, weight, HS code, consignor and consignee) and information about the ports/terminals.

GMR — Goods Movement Reference

The GMR is a unique goods movement number generated in the Goods Vehicle Movement Service (GVMS) run by HMRC. It is mandatory for all lorries entering the UK through ports served by GVMS (Dover, Eurotunnel, Holyhead, Hull and others).

How is a GMR created?

The GMR is created by a customs agent or carrier with access to the GVMS system. To create a GMR you need:

• the MRN from the ENS (safety and security declaration)
• the MRN from the import customs declaration (if applicable)
• the vehicle (tractor unit) registration number — it must match exactly
• the planned port of entry

How does the driver use the GMR?

The driver gives the GMR number at port check-in (in the terminal app, to a reader, or at the barrier). The GVMS system verifies whether all the declarations linked to the GMR are valid. If they are — the vehicle is cleared to enter (Check In). If not — it is directed to the inspection area.

BTOM — Border Target Operating Model

BTOM is the UK government's announced operating model for border controls, rolled out in several phases from 2023-2024. Its aim is to standardise and tighten import controls, particularly for food products, plants and animals.

What did BTOM change for PL-UK transport?

• Since 30 April 2024: Mandatory Health Certificates for animal and plant products from the EU
• Documentary and identity checks: Extended to all points of entry
• Physical checks: Random, but more frequent for high-risk goods
• IPAFFS: The notification system for regulated goods — must be submitted before entry

For standard industrial cargo (car parts, consumer goods), BTOM did not introduce fundamental changes beyond the standard ENS/GMR clearance. For food, plant and animal cargo, the change is significant.

Document flow — from loading to clearance

LOADING → ENS lodged (ENS MRN obtained)
       ↓
Agency creates the GMR in GVMS (adds the ENS MRN + registration number)
       ↓
Driver travels to the port with the GMR number
       ↓
PORT: GMR scanned → GVMS verifies all MRNs
       ↓
CLEAR → boarding the ferry / HOLD → inspection
       ↓
AFTER ENTRY: Import clearance (CDS) → import MRN

Key contact numbers and systems

• HMRC Imports: +44 300 200 3700 (customs matters)
• GVMS helpdesk: Through the HMRC portal — gov.uk/guidance/using-the-goods-vehicle-movement-service
• GMR status: check.hmrc.gov.uk/gvms

You can find a detailed guide to all UK procedures for carriers and freight forwarders in the UK customs procedures compendium maintained by easyclearance.pl — updated continuously in line with HMRC and BTOM changes.

Summary

Updated: March 2026. Check for changes at gov.uk/hmrc.