The project includes:
- A new Central Foyer - a glazed atrium that will cover the space between the Queen Elizabeth Hall and Purcell Room, and the Hayward Gallery.
- A new Glass Pavilion - a venue "floating" on top of the Central Foyer, designed to hold a full orchestra of 150 and choir of up to 250 plus small audience.
- A new 'liner' building along Waterloo Bridge, including a national literature centre and two restaurants.
- New venues for gigs and dance performances in the undercrofts - the spaces underneath the complex.
- general refurbishment work
- improved disabled access
More top news
As upcoming film Suffragette highlights the plight of women fighting to get the vote, we take a look at the key moments in the struggle.
As the upcoming film Suffragette is about to be released, ITV News speaks to the family of one of the key figures in the movement.
Something is afoot in Walthamstow, with several Twitter users posting videos of fights.