Orders shipped outside the EU may be subjected to import taxes, customs duties and fees applied by the destination country and 24Bottles has no control over these charges, nor can predict what they may be unfortunately.
As shown on hmrc.gov.co.uk, on orders up to £135 (shipping costs excluded) to the United Kingdom, no customs duty will apply, so you will not have to pay additional charges upon delivery. In any case, we always suggest you to refer to hmrc.gov.co.uk for more information and up-to-date guidance about the matter.
If you go for reaching HMRC, as you can read here https://www.gov.uk/goods-sent-from-abroad/tax-and-duty (in "Customs Duty" section), if you’re charged too much, you can ask for a refund of VAT or Customs Duty.
You should download and fill in form C285 if a courier or freight company delivered the goods.