Discovered a great tit nest in the garden today. It's located in quite a large hole in a dead tree half-way down the slope around the back. Managed to get a couple of photographs of the birds leaving the nest, one of which clearly shows the bird carrying a feacal sac. I captured doing some digiscoping. The pictures could be better though so that will be a target before the chicks fledge. They were being brought some rather large caterpillars so it might not be that long.