The GNR Atlantics are a class of 4-4-2 locomotives built by Henry Ivatt at Doncaster in 1898 and 1902.
They were designed to replace the Stirling Singles of 1870 vintage. 22 were built in 1898 and a further 94 with a larger boiler in 1902. The first small-boilered Atlantic and the first British Atlantic tender engine, no. 990 'Henry Oakley' (the only one to be so named) is preserved at the National Railway Museum in York. The only other survivor is the first of the larger-boilered examples, no. 251, on loan to Bressingham Steam and Gardens in Norfolk. Three known Large Boiler C1 were used by Maldon timber company intill the 1970s, one of them was the boiler of 3287 which is being used to make the new LB&SCR H2. The other two have been reported to been scrapped as they were in bad condition.