My reading around on this is that it could well be higher. My fave courier agency, Interparcel, is now posting quotes sans VAT. In other words, VAT will be charged by the customs of the country of delivery at their rate. The item will be held until all dues are paid - which will include a charge for handling the import.
Not known at the time of despatch, unless you have done some serious delving and calcs, is the rate of duty on the item[s]. VAT is charged on the value of the item, the duty [yes, a tax on a tax] and the charges [+ VAT] of the shipping company’s paperwork for importing the thing.
The BoJo puff that The Deal has resulted in tariff-free interchange is virtually - not quite - a porkie. Duty will be charged on items that do not originate in the UK.
All the millions of items that are imported into UK, either by wholesalers or to UK based hubs that found UK a convenient base to sell on to EU countries, will be subject to tariffs. The Chinese particularly have been increasingly stocking goods in the UK to eliminate the weeks of delivery time from China. British traders of origin on the subcontinent - India/Pakistan - have been establishing retail outlets for years for stuff sourced from India, China and elsewhere in the east. Ebay.uk is an eastern bazaar based in UK
The cut-off point for no duty charge is a derisory £11.00