Hi Customs oldtimer,
You will need to apply for a VAT EORI Get an EORI number
you need your:
Unique Taxpayer Reference (UTR) - find your UTR if you do not know it
business start date and Standard Industrial Classification (SIC) code - these are in the Companies House register
Government Gateway user ID and password
VAT number and effective date of registration (if you’re VAT registered) - these are on your VAT registration certificate
National Insurance number - if you’re an individual or a sole trader.