>>> turkey is buying it to recycle it's up to turkey to sort this out
Analogy:
If you enter into a contract with someone to take your domestic waste away you have a LEGAL RESPONSIBILITY to check that the person/company you're dealing with is a licensed waste contractor, who will only dispose of your waste in a proper manner. If you use an unlicensed carrier, who then fly tips your waste, you can be taken to court and face very stiff penalties.
It would't seem unreasonable to me to also expect UK waste companies who're sending waste overseas to be LEGALLY REQUIRED to check that it's being disposed of responsibly (whether by genuine recycling or, in the case of non-recylable waste, in a way that meets internationally-accepted standards for getting rid of it, e.g. to power district heating schemes).
We expect fashion retailers like Primark to ensure that the workers who're producing the goods they sell are being well-treated by the standards of the countries they're employed in (and also by international standards, where relevant) and that practices such as using child-labour aren't being used. Surely we should be expecting companies who trade in the opposite direction to be similarly responsible in what they do?