OK.
So, if we accept what SofS has to say at face value (thinks: Almost certainly written for him by someone in MB, theres no way political animal of Bob's type would have that firm a grasp on the subject), then if that is the threat... what do we require to deliver against it?
"While it is true that Britain faces no direct territorial challenge"
Which means, its about projection, yes? Influence on the world stage? Who (apart from the obvious players) in the world, let alone Europe, may face a direct territorial challenge in the near future? Israel? Iran? North Korea? Syria? Pakistan? Somalia?
So... when is it going to be reflected in what we procure?