He was very poorly not so long ago. A bit battered, but mealy worms [dry ones !] have done the trick. He waits for me every morning to feed him. I am the bird nurse lol!
I had a bag of bird seed in the garage. John had a look under the bonnet of the car, at the engine, and lo and behold, there was bird seed in the air system. We caught a mouse overnight, so hopefully - for my sake - no nest in the car. They know a nice car when they see it lol