I've had parcels with printed labels go hither and tither kicking around the east coast of the USA, to the flyover part of the country then back to the east coast and back to flyover country all the while the contents of the parcel melted and were damaged. The parcel travelled from L'viv Ukraine to Warsaw, then to London in a total of four days and thence to customs in New York for a week - then spent two weeks on it's sojourn back and forth through the eastern part of the country before it wound it's way to me. For most parcels from Britain I just use couriers like DHL, FEDEX or UPS.
It's situations such as this that make me feel glad I'm old.....one more thing to stop worrying about. I've worried all my life