Channel Islands referred to as an 'Île normande' (as opposed to "anglo-normande"). 'Îles Normandes' and 'Archipel Normand' have also, historically, been used in Channel Island French to refer to the islands as a whole. The very large tidal variation provides an environmentally rich inter-tidal zone around the islands, and some islands such as Burhou, the Écréhous, and the Minquiers have been designated Ramsar sites. The waters around the islands include the following: The highest point in the islands is Les Platons in Jersey at 143 metres (469 ft) above sea level. The lowest point is the Atlantic Ocean (sea level). The earliest
Edna Iles by Ernest Bloch, Alan Bush, and Malcolm Arnold, and won praise from leading composers for the technical refinement and structural integrity of her interpretations. Edna Iles recorded her last recital for BBC Radio 3 in 1977 and in 1980 took part in a concert marking the centenary of Medtner's birth. In 2001 she donated her entire library of Medtner material to the British Museum. It includes detailed notes on all her piano lessons with Medtner, which provide unique information on how the composer taught and wished his music to be interpreted. The archive is the subject of a doctoral thesis.