HMS "Pegasus" was an aircraft carrier/seaplane carrier bought by the Royal Navy in 1917 during the First World War. She was laid down in 1914 by John Brown &amp; Company of Clydebank, Scotland as for the Great Eastern Railway Company, but construction was suspended by the start of the war. The ship was converted to operate a mix of wheeled aircraft from her forward flying-off deck and floatplanes that were lowered into the water. "Pegasus" spent the last year of the war supporting the Grand Fleet in the North Sea, but saw no combat. She spent most of 1919 and 1920 supporting British intervention against the Bolsheviks in North Russia and the Black Sea. The ship remained with the Mediterranean Fleet until 1924, but was placed in in 1925 after a brief deployment to Singapore. "Pegasus" was sold for scrap in 1931.