She is trying to shape the story (as you might expect from a journo). So let's strip it back. The issue is the underlying intent and now, the frantic back peddling by Soubry as she seeks to limit the damage. If there was never any intent in the first instance, there wouldn't be anything to firefight.
The issue never was that the MoD wanted to close it and she never wanted it to be closed. But it made the decision to stop funding without properly planning the transition or legacy. Soubry was either party to that process which shows lack of judgement on her part or she simply wasn't in the loop which shows lack of oversight, or she simply didn't comprehend the consequences.
Saying, as she has been, "we remain committed to its preservation” is not the same as saying that ultimately, it will remain open and cared for. I'm committed to losing some weight this January but that's not the same as saying it's going to happen. Commitments these days, are mealy mouthed babble, the preserve of the prevaricator.
Similarly, Jo Johnson suggesting "Great news MoD committing to preservation of Battle of Britain Chapel in Biggin Hill -thanks to good sense of Anna Soubry" is nice because it's putting pressure on her but it's still not the same as saying "Great news MoD will be keeping the Battle of Britain Chapel in Biggin Hill open and preserved".