Unfledged pigeon?

Our cat, who loves climbing trees and stealing baby birds, brought this little mite in this morning, I'm pretty sure it's a pigeon.  I've tried the well known Animal place, but they want money before they do anything. I've tried our local (Warwickshire) Animal Welfare Trust, and they can't help. I saw the suggestion about taking it to the vet, but I'm currently stuck at home with a torn calf muscle. Has anyone any ideas please. We are in Bedworth, Warwickshire. Many thanks.