Cheap fares for schools and pleasure parties, by Kate M Burrell, 1928 - Poster and Artwork collection online from the London Transport Museum I don't know if it real or ironic. This kind of art can be used to make something ironic and witty.
Underground Day - Make Your Choice ~ August Bank Holiday poster by Charles Sharland, This poster was designed to promote travel in and around London on the August bank holiday, renamed here 'Underground Day'.
Winter sales, by Edward McKnight Kauffer, 1921 - Poster Art London Underground's Greatest Designs. A major exhibition at London Transport Museum opening on 15 February 2013 in celebration of anniversary of the Underground.