Originally Posted by
OzzyOzBorn
Because those two airports serve different regions of the UK.
Cargo doesn't care where it's delivered to. A few hours by road at the end of a week long journey from China doesn't make a difference.
You've only got to post something by UK > UK next day delivery using a courier service such as Hermes etc to see the bizarre routes parcels take, to get from say, Liverpool to Manchester.
Liverpool > East Midlands parcel depot > Manchester