WIREDGOV

The Ministry of Defence acted quickly once it realized, in early 2012, the extent to which its 2010 decision to procure the carrier variant of the Joint Strike Fighter (JSF) had been based on immature data and flawed assumptions. In May 2012, the Department announced that it was reverting to procuring the short take-off and vertical landing (STOVL) variant of the fighter. In a report published today examining that 2012 decision, the National Audit Office has called for the Department to introduce a degree of consistency in decision-making not previously apparent in the Carrier Strike programme and to work within the financial and capability assumptions underpinning the decision, if it is to deliver value for money.

By February 2012, the estimated cost of converting the aircraft carrier for the carrier variant of the JSF, requiring the ship to be fitted with catapults and arrestor gear (‘cats and traps’), had increased by 150 per cent: from £800 million to about £2 billion.  As a result, the Department estimated that, over the next ten years, the STOVL option would be £1.2 billion cheaper than the carrier variant. This difference halves to £600 million over 30 years.

Full report: Carrier Strike: The 2012 reversion decision