Just in case anyone doesn't understand the words, descent, steep descent or plummet, the Telegraph has illustrated it nicely
here 
Has the Sun laid off a load of (scum-sucking) journos who have gone on to get work with the broadsheets?
The reporting of this incident is just blatant sensationalism by Hadow and BBC journos who make a living from telling stories. If they are going to claim the stories to be factual they should check those facts before broadcasting them.