Shipping Forecast August 2017 was the 150th anniversary of the shipping forecast. The 31 sea areas covering the waters around the British Isles are as defined by the map shown here: The areas were already roughly as listed above by 1949. In 1955, meteorologists from countries with North Sea coastlines met and recommended that the UK's sea area 'Heligoland' be renamed 'German Bight' to reflect more general usage amongst the nations concerned. They also recommended the divisions of 'Dogger' (with the north-eastern portion to be named 'Fisher') and 'Forties' (with the northern half becoming 'Viking'), and the renaming of 'Iceland' as 'South-east
British Isles also taken to be part of the British Isles, even though, as islands off the coast of France, they do not form part of the archipelago. The oldest rocks in the group are in the north west of Scotland, Ireland and North Wales and are 2.7 billion years old. During the Silurian period the north-western regions collided with the south-east, which had been part of a separate continental landmass. The topography of the islands is modest in scale by global standards. Ben Nevis rises to an elevation of only , and Lough Neagh, which is notably larger than other lakes