In December 2018, just before policymakers and pundits escaped their besieged bunkers for Christmas, the UK government published the long-awaited final report on its Modernising Defence Programme. This programme was meant to update the military commitments made in the last full-blown Strategic Defence and Security Review of 2015.
How far it has succeeded in that task is debatable, however. The report's brevity and lack of detail left many lamenting a missed opportunity.
Revising 2015's review became necessary thanks to a marked change in circumstances. Partly, those changes are strategic. Relations with Russia have deteriorated even further since 2015, Islamic State (IS) is much diminished, and new military technologies and tactics are advancing.