Cross-border developments and trading corner – 16 March 2026

In this week’s cross-border trading corner, we bring you the latest guidance updates and publications. The most recent Trader Support Service bulletin is also available as is the latest Brexit and Beyond newsletter from the Northern Ireland Assembly EU Affairs team. HMRC is also seeking the assistance of small business owners to help shape the future of the new Trader Support Service.

Research sessions: new Trader Support Service (TSS)

HMRC is seeking small business owners across the UK to participate in research which aims to make the new TSS as efficient and user-friendly as possible.

As recommended by Chartered Accountants Ireland, the TSS will become a permanent service providing support for businesses that move goods in or out of Northern Ireland. The service will also help businesses navigate changes to import and export policy. Business owners can sign up for the research sessions online.

Miscellaneous guidance updates and publications

This week’s miscellaneous guidance updates and publications are as follows:

• Community and Common Transit UK offices list,
• Customs Declaration Service error codes,
• Classifying toys and games for import and export,
• Notice to exporters 2026/04: transmission issues between LITE/SPIRE and CDS,
• Making an import declaration in your records,
• Moving sheepmeat, poultry and beef to Northern Ireland from outside the UK and EU,
• Report exports that arrived or left a UK port that were not notified in CDS,
• Report and manage your allowance for Customs Duty waiver claims: service availability and issues,
• Customs Importer and Exporter Population: 2025,
• Customs Technical Handbooks,
• Customs Supervised Export overview,
• Customs Supervised Export,
• Designated Export Place, and
• Designated Export Place overview.