There are established routes for shipping. They use inside people when shipping directly to Europe. Other orgamized players ship to Africa, and then smuggle it by land (and maybe some by boat) to Europe.
Using the mail system is risky. Expect losses. Ship to homes that are unoccupied. Follow the shipment using the tracking number, and wait and watch the delivery from a distance, or use a remote camera. Make sure it's an area where you have the advantage. Have a way out before you go in. A unoccupied home near a wooded area with trails, for example. Use a bicycle, or off-road electric scooter. Watch the drop. Get your package, and ride quickly to, and through, the woods. Make sure you exit the woods at a place where there are no cameras. Put your bike or scooter in the trunk in the trunk of your car, and leave. With gloves open the package at a place where you will not be abserved, remove your item, check it quickly for any GPS or alarm, and dispose of the packaging.
Listen to your gut. Don't ever put yourself at risk. Not even once. Ever.
Big demand for coke in England.