On the other hand this may just be the public airing of a definition of ISD that's been known about for at least two years, rather than definite slippage.
Interestingly enough, I read somewhere this week that LM are offering the USN a one or two year early LRIP of Dave-Charlie......
Do the above two combined offer an opportunity? It would mean we could bin the RVL and I'd be able to sleep much better knowing that......