Some interesting info in this article: https://www.bbc.com/news/business-55734277
"...
Under the new rules, anyone in the UK receiving a gift from the EU worth more than £39 may now face a bill for import VAT - with many items charged at 20%.
For goods costing more than £135, customs duties may also apply, which can range from 0% to 25% of the product you're buying if they have not been paid by the sender already.
The extra charges are usually collected by the courier on behalf of the government, with customers asked to pay before they can pick up their package."
..."
My purchase was under £135 so I escaped the additional customs duties; it was only VAT and handling charges. (Btw, the item that should have been delivered on 16th, after the payment, has been delayed and is planned to be delivered almost a week later on 22nd.)