I was lucky to stumble upon this nest in a hole in the tree which was very low down and quite vunerable, on one visit i came upon a squirrel checking out the hole, but i fortunately scared it off and to find the family still safe was very reassuring.
Im not sure if its a Willow or Coal Tit nest, the ID in the books between these and the Marsh Tit are all very similar with little or no differences, but i think it could be the Willow Tit as it has no white flect marking on the wings as do the Coaltit.
I was glad to have the pleasure of seeing one of the babies peep out of the hole on the morning of my departure, it was a great finale' as i could hear a lot of noise from thm in the nest but to put a face to it seemed a good ending.