GNR Class C1 (large boiler)

The Great Northern Railway Class C1 large boiler was a type of 4-4-2 steam locomotive, known as the Large Atlantic, designed by Henry Ivatt as an enlarged version of the engines the LNER later classed as C2. Ivatt's aim was a powerful, free-steaming engine for the fastest and heaviest expresses on the Great Northern, and the class is seen as the start of the East Coast big engine policy. The pioneer, number 251, was introduced in 1902, and eighty more followed from Doncaster Works between 1904 and 1908. Most were of a standard type with two outside cylinders, though a few differed, including some compound engines. The class reached speeds of 90 mph, stayed in front-line service for many years and lasted into British Railways days. None was ever named, and only number 251 is preserved, in the National Collection.