Squirrel,
That might be the right decision, but it wouldn't be the one I'd bet on hearing. Much more likely that if F35B gets canned so do the carriers and the Air Force gets a reduced buy of -A's.
Remember that SDSR only agreed to build the carriers because MoD couldn't cheaply get out of the contract and that it planned to sell/mothball one. Since then we have had (IMHO a pre-situated and over blown) appreciation of the costs of conversion for -C and there's still no current political capital behind the idea of a continuously available carrier force. Canning the carriers also saves a huge pile of through-life costs in ops, support and people when there still ain't no money ( and no votes in it either).
N