The paper concludes that "given the opportunity costs for conventional capabilities that current plans for Trident renewal are due to incur over the next decade..there is now a growing case for a re-examination of whether there are less expensive means of pursuing this objective.
The product of an 18-month study led by the Cabinet Office, the 2013 Trident Alternatives Review was aimed at establishing whether or not there exist credible alternatives to the UK's submarine-based Continuous At-Sea Deterrent (CASD) in the context of the wider national debate around Trident.