What it (hopefully) means is a high-readiness / low readiness mix as per the LPDs - which was only common sense. The mothball / sell option was always a soundbite to indicate political unhappiness with the BAE contract, though Christ knows why, given the amount of d1cking about performed by MoD prior to contract award - what did they expect?
If it actually means two in commish for extended periods, even better, but not holding breath......