London Underground turns 150 with Mark Wallinger’s labyrinthine roundels

100 artists remake the iconic London Underground Roundel for excellent new book

15 artists create new work to mark London Underground's 150th birthday

Photography: 40 years of the London Underground captured by Bob Mazzer

Continuous revolutions abound in Mark Wallinger’s new show

Poster, Museum of Practical Geology, for London Underground, 1921 (CH 18447411)

The New Look: Looking back at Roundel’s 1980s identity design for British Rail’s Railfreight

Poster, Museum of Practical Geology, for London Underground, 1921 (CH 18447411-2)

London Underground’s typeface: uncovering the designs that form “London’s handwriting”

The Roundhouse publishes enormous archive of posters to celebrate 50 years as a performing arts centre

Poster, Winter Sales, for London Underground, 1922 (CH 18447481)

Poster, London History at the London Museum, for London Underground, 1922 (CH 18447525)

Poster, London History at the London Museum, for London Underground, 1922 (CH 18447525-2)