When the contract for the DII programme was approved in March 2005, the target date for completion of Increment 1 was end July 2007. The target date was revised in December 2006, when the contract was amended to include Increment 2, and again in October 2008. The delivery target of 62,800 terminals was completed in mid February 2009 within weeks of the planned milestone set for the end of the first increment.
The original estimate for the DII programme was £5,854 million. This estimate did not include the Deployed and Top Secret requirements as their capability and scope was not fully mature at that time. The current estimated cost of realising DII, including the cost of related programmes, is £7.1 billion. This remains unchanged from the figure reported by the National Audit Office in July 2008.