Serpentine Sackler Gallery opens doors for first time
25 September 2013 Last updated at 16:23 BST
A £14.5m extension to the Serpentine Gallery is set to open its doors for the first time.
A former nineteenth century gunpowder store has been transformed into the Serpentine Sackler, with a new gallery and restaurants.
Brenda Emmanus was given an exclusive preview at Kensington Gardens.