If I can jump in here, I'll bring this back to the point on the main estimates. One of the advantages of simultaneously presenting the main estimates and the budget and having them reconcile with each other is that there is no outside information. Right from there, any additional announcement would automatically be in supplementary estimates.
Having such a grey zone between those two dates can muddy the waters even more for somebody wanting to track those down. Just on the main estimates side, that would be one suggestion.