Hi macktheone,
As per our terms and conditions HMRC is unable to provide specific or tailored advice through the Online Community Forums and cannot comment on any form of calculation, example or scenario as we may not be in possession of all the relevant information.
The HMRC Customer Forum is for general queries only and is intended to help our customers self-serve.
However you would need to be VAT registered as you are selling goods that are located overseas when supplied and if these goods are under £135 then there is an obligation to register for VAT and charge sales VAT to your end customer.
Please see the guidance at:
Changes to VAT treatment of overseas goods sold to customers from 1 January 2021
Customers with more complex enquiries often engage the services of a professional advisor or accountant and this may be something you wish to consider.
Thank you.