My oldest step son Thomas was rummaging about in one of our sheds and came across an old nest with an egg in it. I know the nest in question and the species of bird that built it and laid the egg but do you? Here's a couple of pic's to help you.
The bird in question is faily common is black and white and the 1st part of its latin or scientific name is motacilla.
Sorry I'm skint so no prizes available it's just for fun Good Luck.