Exit day is 31st October 2019
Because only some of the traders who import/export goods to/from the EU have registered for their GB EORI number, HMG is auto-enrolling now.
An EU country specific EORI number is also required.
EORI numbers are not required for UK/Ireland trade across the Irish Border.
If a trader does not have the relevant EORI numbers, their goods will not clear borders.