Exit day is 31st October (for the moment)
I posted yesterday with Warning re Get Ready Brexit Checker, and I said the reader should check in-country (the receiving country).
Statement from @deptinfra on GB stickers (posted by @DarranMarshal, twitter)
“The requirement that all UK motorists driving in Ireland should display a GB sticker stems from the 1949 Geneva Convention on Road Traffic. It is not an EU requirement & is not affected by Brexit.”
UK Get Ready Brexit Checker says all UK vehicles will be required to have a GB sticker when travelling in the Republic post Brexit.
Northern Ireland’s Department of Infrastructure statement:
“We are not aware of any occasion when this has been enforced by the Irish government.”
Cardinal Environment Limited's Blog 