The commission, from Art on the Underground, is part of celebrations to mark the Tube's 150th anniversary.

BBC: Mark Wallinger unveils labyrinth Tube art

Vintage Tube logos form the background of a commemorative Oyster card to mark the 150th anniversary of London Underground rail service in London.

BBC: Oyster card celebrates 150th Tube anniversary

Like other rescue workers whose job it is to venture underground, Angeli and Steelman spray orange paint to mark the places they have searched.

CNN: workers

While researching the Tube's history, the museum reported the differing opinions about the project in a newly-published book, called Underground: How the Tube Shaped London, to mark the anniversary.

BBC: ��Sulphurous�� fumes and class division on Victorian Tube

Special events are being held throughout the year to mark the 150-year anniversary of the Underground.

BBC: London

Artist Mark Wallinger has unveiled his labyrinth design for artworks to be displayed at every station on the London Underground.

BBC: Mark Wallinger unveils labyrinth Tube art