Planning permission for a new extension to the Victoria & Albert Museum has officially been granted today. The £41 million project will be the biggest new art space in London since the Tate Modern.The bid to design a 1,500 square metre underground gallery for temporary exhibitions, courtyard and entrance on Exhibition Road was won by architecture firm, AL_A, in March 2011. We interview Amanda Levete, founder and director of the firm, about the specifics of the plans and her thoughts on the government’s support of British architecture. Amanda Levete is one of the most successful women in architecture and is married to Ben Evans, director of The London Design Festival. She regularly collaborates with artists such as Anish Kapoor and has previously worked on projects such as the Selfridges department store in Birmingham, the media centre at Lord’s cricket ground and, with her own firm, installing ‘The Timber Wave’ in the entrance to the V&A.