Forty-seven 8-car units will be built for use on the Victoria line. These replace the line's original 1967 tube stock. The trains are still being built. They were introduced by 2012, when all of the 1967 tube stock trains were completely replaced. The first 2009 tube stock train started running on the line with passengers on board on 21 July 2009. One new train will enter service every two weeks from early 2010.