I can't put this any better than Not a Sheep, so I'll just lift his entire post instead!:
If there is an unwelcome rise in unemployment next month, will the story be shoved back to just before the humorous item again?
Reporting of economic news depends on the news
When the dreadful inflation figures were released on Tuesday the coverage was skimpy and by the end of the afternoon the news story was the last item on the 5Live news, just before the humorous item. By way of contrast, today when the better than expected unemployment figures came out today it was headline news from the moment of announcement and was still the lead story in the 6pm Radio 4 news.
Do note how the BBC adjust their coverage of news stories to push a pro-Labour message. It's sometimes subtle, sometimes obvious, but almost always there.