They don't need to reopen SDSR, they'll just hide the additional cuts in PR11
Which is precisely the problem - this is exactly what happened last time, and it saw programmes being pushed right to the next
PR on financial, rather than strategic grounds. It doesn't take the brains of a rocket scientist to work out that there are always going to be additional costs imposed by delays; it also rewards "entryism" of deliberately underestimating costs to get something into the programme, knowing that virtually nothing is ever actually cancelled - MRA4 being the obvious exception.
Heroic assumptions aren't.
S41