In the largest ever commission of its kind, Mark Wallinger today unveils Labyrinth, 270 unique works, one for each of the 270 stations on the London Underground network.
The commission, from Art on the Underground, is one of the highlights of a series of special events and commissions in 2013 to celebrate the 150th anniversary of the London Underground
More top news
A survey found 50% of people were in favour of charging drivers based on how much they drive.
Police said they are "extremely concerned" for the welfare of a "vulnerable" mother and her two children who have gone missing in Bexley.
It is hoped the 7,400-mile journey will become a cost-efficient and time-saving way of transporting trade between China and the UK.