Britain has spectacular colonies of puffins, guillemots, kittiwakes and skuas, but recently many birds have failed to breed. In the summer of 2006, bird expert Roy Dennis travelled in search of answers. He reveals that, as our seas are getting warmer, the sand eels that seabirds depend on are declining. Some seabirds are learning to find new sources of food and, with a bit more protection, Roy believes they can adapt and survive.