Shell-Mex and BP Ltd was a British joint marketing venture between Shell, and British Petroleum. It was formed in 1931, partly in response to the difficult economic conditions of the times, and operated in the UK only. The brands separated again in 1975.

The company's head offices were at Shell Mex House on London's Strand.

Oil and gas companies of the United Kingdom | Defunct companies of the United Kingdom | 1931 establishments | 1975 disestablishments | Joint ventures