Sir Ernest John Hutchings Lemon OBE (9 December 1884 – 15 December 1954) was an English railway engineer, and was chief mechanical engineer of the London, Midland and Scottish Railway and later one of its three Vice-Presidents.
Lemon was born in the small village of Okeford Fitzpaine, in the registration district of Sturminster Newton, North Dorset.
[2] He served an apprenticeship with the North British Locomotive Company and then worked for the Highland Railway and for Hurst Nelson.
After less than a year as CME however, Lemon was again promoted to Vice-President, Railway Traffic, Operating and Commercial, replacing J.H.
William Stanier had been head-hunted from the Great Western Railway to replace Lemon as CME and revolutionised the LMS's locomotive policy.