You cannot Export or Import from/to the UK if you do not have a valid UK EORI number. If you are not sure whether you have one, search “EORI Number validation” into
your chosen internet search engine and ‘000’ (3 zeros) to the end of your VAT number with a prefix GB. e.g. GB123456789000
Should you still need to register, you can do so at www.gov.uk/eori