The nest box blue-tits have fledged and left home and Mr & Mrs Woodpigeon are doing sterling work sitting on their nest - especially in the face of the attention being paid by Paddy-the-Cat.  He managed to climb on to the fence in an attempt to reach into the tree a couple of days ago but I hosed him before he could do any damage.  I've since put up chicken wire along the top of the fence which should prevent him jumping up again.  Throughout all this, the pigeon remained clamped to the nest, immobile - brave bird!