When I lived in Illinois near Chicago before moving to Montana, I helped at the shelter I adopted 2 of my cats from. I eventually became their webmaster and began to make condos the could resell. At one point they asked me to make a video they could play on their computers for people to explain why people should consider adopting the older cats, not just the kittens. This was my 1st attempt and they used it for years. Keep in mind it is now dated (being made between 1999 and 2000 if memory serves me) and any statistics given are both 9+ years old AND based for the USA. Still, I felt it was a moving video and they say it did get many people to adopt the older cats! Oh, and all the cats used in it were from Save-a-pet then. I spent 2 days there with my camera, taking images and playing with the cats all day. (it is about 3MB so please be patient while it loads and starts up)
http://www.save-a-pet-il.org/test/oldcats.swf
In the UK, do most people gravitate to the kittens and young cats for adoption also?