The 1967 stock was replaced bit by bit from July 2009 as part of Transport for London's 5-year £10 billion redevelopment project. The replacement for the line's 1967 tube stock is the 2009 tube stock built by Bombardier Transportation. The first train was built in 2006. Testing of the new trains began in 2008. The main fleet began to be introduced in 2009 and went into main service in 2010. The last of the 1967 stock trains ran on 30 June 2011, after which the whole service was provided by 2009 stock.