Elmgreen and Dragset's large sculpture of a child on a rocking horse has become the latest artwork to take up residence on the Fourth Plinth in London's Trafalgar Square.

The duo's Powerless Structures, Fig 101 replaces Nelson's Ship in a Bottle by Yinka Shonibare, after it was commissioned by London mayor Boris Johnson last year.

Elmgreen and Dragset said, "The boy on his rocking horse will have a fascinating viewpoint throughout 2012 as Trafalgar Square will host all kinds of events."

Details: www.london.gov.uk

Image: James O Jenkins