Re: Thinking it through
"Its not hard to dump overproduction - it costs 30p to ship a phone from China to the UK. I cant imagine it costs much more to get a load of frozen chickens over to Africa."
It is hard to think of an appropriate response without disparaging your imagination. A frozen chicken will take up 4-8x the space of a phone in a box. That means it will start by costing several times more - volume is everything in distance shipping of dry goods. But even more important (and also apparently missed) - a frozen chicken is frozen. You cannot use a cheap, standard shipping container; a freezer container costs 3-4x more than one used for cell phones (factor that capital cost into the price), and because it is expensive you will want it back or will have to sell it at a loss at the endpoint (more cost), although you will might try to ship something the other way if you can (what frozen exports are there from Africa?). A freezer container will have less internal space - insulation and compressors take valuable cargo space, so yet higher cost/unit shipped. And you need power almost the whole way - you cannot just stack that container with the cell phone containers on the ship, and you cannot leave it for a day sitting unplugged in a stack on the dock - so shipper will add on a big premium to keep it powered.
So with just a little imagination I can easily believe £2+ per chicken for shipping.