There was a change in accounting at the MoD as I understood that meant that previously the deterrent was treated separately as a security item.
Renewal from 2015 is going to be more difficult as it is now a defence line item which can be whittled down.
Getting someone with the right technical background to explain the value of CASD and its relevance in the modern era - just getting politicians to understand the value of deterrence and know what a second strike capability is, will be much tougher.