I, like many members here, have been buying abroad from the likes of HobbyKing for at least 10 years and always had excellent service and their products are beyond reproach.
I doubt that many of the Radios, motors, ESCs, servos, connectors etc sold by UK suppliers are manufactured in Europe, never mind in the U.K. Certainly a lot of "British" products are built using foriegn components.
AliExpress and Temu etc provide free delivery, often within 5 to 8 days. Free, "no questions asked" returns to a UK Agent with refunds issued as soon as that Agent processes them.
We do buy things in the U.K., but not because we think all their stock is made locally.
With over 70 members sailing, building and buying, we soon learn which particular item is poor quality aand which is exceptional value. Just because an item is 5 times dearer, it doesn't guarantee it is 5 times better, or 5 times more reliable.