It seems so strange that there are so many cats needing homes, but so many people struggling to adopt. I was lucky when I got Boris and Matilda, as Cats Protection didn't have any kittens left up for adoption when I went in. I was with my friend who worked there and they whispered to my friend that we could have a look round and come back when the other people looking had gone and I could see the "special kittens". These turned out to be Boris and Matilda who weren't up for adoption as Boris was recovering from pneumonia.
I did enquire about another pair of kittens a couple of years ago and got an email back saying that they had been reserved, but if I wanted to complete the form available on the website they would see if they had any other suitable cats and would get in touch. So they seemed fairly organised, but I guess it depends by location.