Knowing how lawyers and government departments work, if this is the reason for the delay, these are my thoughts on the delay:
Announcement pending on 19th June. Then the LDF thing was announced, which fundamentally changes the focus of the report. Mr Pickles can avoid greenbelt hassle by calling it a local issue once it is out of greenbelt. The meeting to ratify the LDF thing is scheduled for 20th June, this date being set AFTER the 19th June decision announcement was announced.
So those who are making the announcement want the LDF thing to be ratified before they publish the report, which may well contain some amendments to take into account the LDF decision. However, official meetings can be postponed, and so no new announcement date is set until they know the LDF outcome. Further, they cannot publish the report until the LDF ratification has had time to settle, or else it looks like the LDF ratification was done automatically, rather than the due process being followed.
So the decision will be announced a short time after the LDF ratification, taking into account its findings, but not immediately afterwards, announcing that the development is welcomed but is now a local issue as the land is no longer green belt. Pickles avoids the wrath of a few hippies and we all move on. This time next year this small delay won't mean anything.
My only concern would be that the LDF ratification could maybe open to challenges that the public inquiry isn't, and so making it local might cause more delays, but I know nothing about planning law. Politically, the LDF thing is perfect for Mr Pickles, and that will come before a celebratory barbecue at the 9's.