Army

It is impossible to judge the defence review without seeing the full budget breakdown, available only to government officials. But even with the information we now have, it is pretty clear that some assumptions are incoherent. Some plans just don’t add up. The most obvious issues are with the shape of the army after 2015.

There may be big troop cuts hidden in this review that Cameron just didn’t want to mention.

1) The mystery of Britain’s 29,000 surplus troops in 2020

At the moment Britain’s 110,000 strong land forces can sustain a deployment of around 10,000. By 2020 this enduring deployment will fall to brigade level, which amounts to around 6,500 men.

This is basically an admission that we will be unable to sustain as big a role in the next Afghanistan or Iraq.

But more curious is the fact that we’re not cutting the land forces by as much as we’re cutting the deployments we expect them to sustain.

The “force generation” ratio — the proportion of troops to boots on the ground — will actually deteriorate over the next decade according to the defence review, even though Liam Fox has ordered a separate review on how to improve it.