And it's not even a Daily Mail link:
http://www.bbc.co.uk/news/uk-scotland-north-east-orkney-shetland-37484437

http://www.bbc.co.uk/news/uk-scotland-north-east-orkney-shetland-37484437

The research, published in the science journal Global Change Biology, indicated some were arriving earlier and others were leaving later.
Some species appear to be staying in Europe for longer in the summer and may breed several times, and that is an advantage
Unbelievable. We need our sovreignity bakc! Anyone up for a vote?