Useful Links
TSS registration link
https://www.gov.uk/guidance/trader-support-service
XI Eori checker
https://www.gov.uk/eori/eori-northern-ireland
How to apply for Irish Eori
https://www.revenue.ie/en/customs-traders-and-agents/customs-electronic-systems/eori-system.aspxap
Irish Eori checker
https://ec.europa.eu/taxation_customs/dds2/eos/eori_validation.jsp
Apply for UK Eori
https://www.gov.uk/eori/apply-for-eori
UK Eori checker
https://www.tax.service.gov.uk/check-eori-number
Trade tariff look up
https://www.gov.uk/trade-tariff
Eire code checker link