Jenni - "tinkle", very appropriate as it had been in there at least 24 hours
I'm trying to avoid the cost of a callout from the vets, have a master plan involving a lot of noise and a very small amount of demolition if it's still there tomorrow, but was hoping for professional help in grabbing it on the way out.
PaulB, re the photo - a mobile phone, a torch and a lot of luck! I touted it around the near neighbours but nobody recognised it.