Hi Janey,
You can use trade tariff UK to find a commodity code for goods you are importing to or exporting from the UK.
You can also use the service to check if there’s duty or VAT to pay and find out about suspensions or reductions.
You can check the type of preference available, rules of origin applicable and proof of origin required to claim preference.
Please use below link to access trade tariff.
Trade Tariff: look up commodity codes, duty and VAT rates
Thank you.