We shipped our cat back to UK last week with very little problem.
Flight arranged by "Petsawayuk" they were great and sorted all paperwork with Defra and booked the cat as cargo which we couldnt do from here.
No Turkish paperwork needed this end, only a fit to travel certificate from your vet, Emre from Pet-life in Gunlukbasi took us to the airport and was a great help.
Awaybill and Defra doc's can all be posted via internet and will be needed at Dalaman.
Because of quarantine and no pet passport valid in Turkey the cat will have Rabies injections on arrival at the kennels in UK so didn't have that done here, just the normal jabs as they are cheaper here, no blood tests needed.
On arrival in UK he was taken to Animal Reception Center then picked up by the cattery.
Dalaman was fun as no-one knew what to do with the cat, eventually he borded via the passenger terminal and had to be taken out of his crate to pass x-ray which caused great delight to everyone, good job he is a laid back cat.
Dogs to Uk is same procedure just a bigger crate.
If anyone needs more advice please ask.