The huge Bankside Power Station, built in 1945 by Sir Giles Gilbert Scott, has been converted by Herzog & de Meuron to house the Tate Gallery’s collection of 20th-century art. Externally, the only visible change is the two-storey glazed strip added on the roof and extending over the entire length of the building. Illuminated at night, this glass structure houses the mechanical services and a panorama restaurant with breathtaking views over London. A new bridge designed by Norman Foster and the artist Anthony Caro will soon provide a direct link with the north bank of the Thames in the direction of St Paul’s.