Adam,
The British political system is similar to ours, hence, we have the same problem.
Politicians usually make an announcement that they will make an announcement in the future to announce that they are actually doing something besides announcing.
The time delay is so that when they announce the decision, they can announce that after careful consultation, the decision was ( nay/yea).
Then their media minders will announce that there are to be no questions as everything will be explained in this little media pack available on the way out of the announcement, and invite them back tomorrow where the honourable member will have another announcement to make about whether he will announce he is forming a committee to look into the problem of why he has to make so many announcements, as he/she doesn't think they should have to be accountable to the people that elected them.