Just a week after the opening of Tate Modern, developers have submitted a detailed planning application for the £500 million conversion of Battersea power station. Designs by Nicholas Grimshaw & Partners, Benoy, Geoffrey Reid Associates, Benson + Forsyth, Arup Associates and Inskip & Jenkins are all included in the ambitious plan by Parkview International. Grimshaw's this week unveiled its proposals for the main building, including a glass wall and ceiling. This structure alone covers an area the size of Trafalgar Square and will create 100,000m 2of new retail and leisure space on five floors. This will be planned in association with Benoy and will feature a purpose built theatre for the Cirque du Soleil, an interactive sports exhibition, and a thrill ride in the form of a gravity lift in one of the chimneys. A shopping centre will also be built, with a multiplex cinema complex in the basement space. 'This is a huge job for us and a very important job for London, ' said Grimshaw director Chris Nash. The project looks set to be the practice's biggest yet in the UK, and Nash estimated that the entire Bankside power station could be fitted into its walls. The plans also include a proposal to rebuild the glass and steel pavilion Grimshaw designed for the Seville Expo in 1992, currently stored in a depot off the North Circular in London. The scheme is part of a 12ha masterplan.