All three of Britain's armed forces would take cuts in manpower. Overall, the largest overseas deployment was expected to be not more than 30,000 personnel, including maritime and air force units. This compares to the 45,000 involved in the 2003 invasion of Iraq. In November 2010, the MoD released its plan to implement the changes.
The SDSR called for the almost immediate decommissioning of the Royal Navy flagship aircraft carrier, HMS Ark Royal, rather than in 2016 as scheduled. This occurred on 11 March 2011.
The SDSR announced the government's intention to switch its purchase of F-35Bs to the carrier-variant F-35C to allow for a wider range and weapons to be used. However, in May 2012 this decision was reversed, and the F-35B was chosen instead, as the previous government had intended. This was because the cost of converting the Queen Elizabeth-class aircraft carriers to accommodate the carrier-variant F-35C had risen to twice the original estimate.
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