Eighty Strand, formerly Shell Mex House, is a grade II listed building located at 80 Strand, London, England. The building was opened in 1932 on the site of the Hotel Cecil and stands behind the original façade of the hotel, between the Adelphi building and the Savoy Hotel. Broadly Art Deco in style, it was designed by Frances Milton Cashmore of the architectural firm of Messrs Joseph.