You may have to pay Customs Duty or import VAT charges on parcels when you send or receive them from outside Great Britain (England, Wales or Scotland) depending on the value.
Before sending parcels from Great Britain or receiving parcels from outside Great Britain you must check who will need to pay any customs charges or duties due in the country of import or export.

VAT is charged on all goods (except for gifts worth £39 or less) sent from:

• outside the UK to Great Britain
• outside the UK and the EU to Northern Ireland

VAT is not charged on goods that are gifts worth £39 or less.

You pay VAT when you buy the goods or to the delivery company before you receive them.

If you have to pay VAT to the delivery company, it’s charged on the total package value, including:

• the value of the goods
• postage, packaging and insurance
• any duty you owe

Standart VAT rate is 20%
More about the VAT rate you can read here:  https://www.gov.uk/vat-rates