Hi Duncan,
You can use trade tariff UK to find a commodity code for goods you’re importing to or exporting from the UK.
This will allow you to check if there’s duty or VAT to pay and find out about suspensions or reductions.
You can choose the country of origin and it will show you if the preference is available.
It will also show you what evidence is required to claim a preference.
Trade Tariff: look up commodity codes, duty and VAT rates
You can check below link for information on EORI.
Get an EORI number
Thank you.