Henry Charles Beck was an English technical draughtsman who created the present London Underground Tube map in 1931. Beck drew the diagram in his spare time while working at the London Underground Signals Office. Although his design was initially rejected, the Publicity Office of London Transport changed their minds after Beck resubmitted an updated copy and the map was first issued a pocket edition in January 1933. It was immediately popular, and the Underground has used topological maps to illustrate the network ever since.