.. bloody customs. By some couriers (parcel force) they actually hold the item until you pay the fee.
found this on the website
even with a calculator 
Depends! If the package has been declared at under the value of $100 and marked as a gift by the sender then there will be nothing to pay.
No. Customs duty is waived if the amount of duty is less than £7.
Import VAT is not payable on:
commercial consignments eg goods purchased over the internet with an intrinsic value not exceeding £18, but this does not include alcohol, tobacco products, perfume or toilet waters
gifts, excluding alcohol, tobacco, perfumes and toilet waters, with a value not exceeding £36 and which comply with the rules shown in paragraph 2.4.g
the gift has been sent from a private person outside the EU to a private person(s) in this country
there is no commercial or trade element and the gift has not been paid for either directly or indirectly
take you pick of the two lol..