British home army in the First World War bridge between Tilbury and Gravesend. There were fears that a German fleet protected by mines and submarines could land a 100,000-strong force before the British Grand Fleet could steam the south from its base at Scapa Flow. To counter this threat, the Admiralty redeployed pre-dreadnought battleships and submarines closer to vulnerable ports, expanded the coastwatch and increased patrolling of the North Sea. In October, Churchill responded to Kitchener's call for the Royal Navy to take more specific precautions against invasion by insisting that the role of the Grand Fleet was to eliminate an invader's covering fleet rather than defeat the
South Orkney Islands station house up to 45 people during the summer, and an average of 14 during winter. The British Antarctic Survey base, Signy Research Station, is located on Signy Island and was established in 1947. Initially operated year-round, since 1995/6 the Signy Research Station has been open only from November to April each year (southern hemisphere summer). Apart from personnel at the bases, there are no permanent inhabitants on the islands. The South Orkney Islands were discovered in 1821 by two sealers, the American Nathaniel Brown Palmer and the British George Powell. The Islands were originally named "Powell's Group", with the