Leslie Sydney Dennis Morley (23 May 1924 — 16 June 2011) was a Professorial Research fellow at the Brunel Institute of Computational Mathematics (BICOM) in London[1] and the author of the book Skew plates and structures.

Morley was elected a Fellow of the Royal Society (FRS) in 1992.

[1] His certificate of election reads: Distinguished and internationally recognised for his extensive researches in structural analysis, particularly in the field of aeronautics.

He is known especially for his pioneering work in shell and plate theory as exemplified by the widely known Morely shell equations and the fundamentally intriguing Morley plate triangle.

His numerous researches also range over such topics as the finite element method, 'practical tensors', variational principles and skewness in structures, in all of which he has made important and practically significant advances.