The Bristol Channel Islands are a group of islands located in the Bristol Channel, off the coast of England and Wales. The islands include Lundy, a small island with an area of 5.2 square miles; Severn, a river that forms part of the border between England and Wales; AVON, a county in England; Sark, a small island in the Channel Islands; WIGHT, an island off the south coast of England; Alderney, the northernmost of the Channel Islands; JERSEY, the largest of the Channel Islands; and Guernsey, the second largest of the Channel Islands.