Lambert Simnel (1938–1952) was a British Thoroughbred racehorse and sire, who raced during World War II and was best known for winning the classic 2000 Guineas in 1941.
In the following spring he won the 2000 Guineas, beating a field which included the subsequent Classic winners Owen Tudor and Sun Castle.
He was ridden by Charlie Elliott and started at odds of 10/1[4] in a field of nineteen runners with the Fred Darling-trained Owen Tudor being made favourite.
In the New Derby, run over one and a half miles at the same course on 18 June, Lambert Simnel started 4/1 favourite ahead of Sun Castle and Morogoro in a twenty-runner field.
[7] Lambert Simnel was brought back in distance for the one-mile St James's Palace Stakes, run that year at Newmarket, and produced a better effort, finishing second to Orthodox.
[3] In their book A Century of Champions, based on a modified version of the Timeform system, John Randall and Tony Morris rated Lambert Simnel an "inferior" winner of the 2000 Guineas.