@calum @declan You've been very lucky then. It all depends on how the goods enter the country and which courier is handling the items. Since Brexit you have to complete a customs form for RM/PO and comply with Notice; 143 if your sending or receiving stuff from abroad. RM, Fedex, TNT, UPS and DHL are red hot on adding import taxes and goods will be held until they are paid. But it all depends on the value of the goods, anything under £135 or 150 euros is fine, but you will get hit with duties over that threshold.
https://www.gov.uk/government/publications/notice-143-a-guide-for-international-post-users/notice-143-a-guide-for-international-post-users
https://www.royalmail.com/brexit
https://ec.europa.eu/taxation_customs/individuals/buying-goods-services-online-personal-use/buying-goods/buying-goods-online-coming-from-a-noneu-union-country_en