If brexit has bad consequences then "a nice little war" would be a convenient distraction. Similar to the early 1980s when Thatcher's fortunes were revived by the Falklands war. A bit of flag waving. Solid jingoism from the Beeb. The tabloids will always come on side.
The only slight problem with this otherwise cunning plan is that the UK military couldn't repeat a Falklands type performance, even if it wanted to. This is what the increasing mass is about, because during the neoliberal era the size of the military in terms of soldiers decreased. Shrinking numbers of boots on the ground means that lethality per head needs to be increased to maintain capability.https://ichef.bbci.co.uk/news/1024/media/images/61372000/gif/_61372427_forces_numbers624x436.gif