This is how the SDSR is shaping up to be spun...
Current Defence budget, minus
Swingeing cuts to all forms of conventional capability, plus
Cost of Trident and its replacement...
.... equals the biggest boost to the Defence budget in recent memory, in glorious defiance of the economic circumstances!
I think the fact that Trident was paid separately from the rest of Defence will be lost on Joe Public, and the resulting 'spike' in the Defence budget graphs will be blatantly misused for the remainder of this parliament.